Deep Web Research and Discovery Resources 2013

Bots, Blogs and News Aggregators ( is a keynote presentation that I have been delivering over the last several years, and much of my information comes from the extensive research that I have completed over the years into the "invisible" or what I like to call the "deep" web. The Deep Web covers somewhere in the vicinity of 1 trillion plus pages of information located through the world wide web in various files and formats that the current search engines on the Internet either cannot find or have difficulty accessing. The current search engines find hundreds of billions of pages at the present time of this writing.  This report constantly updated at .

In the last several years, some of the more comprehensive search engines have written algorithms to search the deeper portions of the world wide web by attempting to find files such as .pdf, .doc, .xls, ppt, .ps. and others.  These files are predominately used by businesses to communicate their information within their organization or to disseminate information to the external world from their organization. Searching for this information using deeper search techniques and the latest algorithms allows researchers to obtain a vast amount of corporate information that was previously unavailable or inaccessible. Research has also shown that even deeper information can be obtained from these files by searching and accessing the "properties" information on these files!

This report and guide is designed to give you the resources you need to better understand the history of the deep web research, as well as various classified resources that allow you to search through the currently available web to find those key sources of information nuggets only found by understanding how to search the "deep web".

This Deep Web Research and Discovery Resources 2013 report and guide is divided into the following sections:

Articles, Papers, Forums, Audios and Videos
Cross Database Articles
Cross Database Search Services
Cross Database Search Tools
Peer to Peer, File Sharing, Grid/Matrix Search Engines
Resources - Deep Web Research
Resources - Semantic Web Research
Bot and Intelligent Agent Research Resources and Sites

ARTICLES, PAPERS, FORUMS, AUDIOS AND VIDEOS (Current and Historical) (top)

99 Resources to Research & Mine the Invisible Web by Jessica Hupp

Academic and Scholar Search Engines and Sources

All of OCLC's WorldCat Heading Toward the Open Web by Barbara Quint

An Interactive Clustering-based Approach to Integrating Source Query interfaces on the Deep Web by W. Wu, C. Yu, A. Doan, W. Meng

Annotation for the Deep Web

Automatic Extraction of Web Search Interfaces for Interface Schema Integration by H. He, W. Meng, C. Yu, Z. Wu

Automatic Information Extraction From Semi-Structured Web Pages By Pattern Discovery

Automatic Meaning Discovery Using Google by Rudi Cilibrasi and Paul M. B. Vitanyi

Beyond Google: The Invisible Web - Tools for Teaching the Invisible Web

Bibliomining Bibliography

Bibliomining for Automated Collection Development in a Digital Library Setting: Using Data Mining to Discover Web-Based Scholarly Research Works by Dr. Scott Nicholson

Bot Research

Client-Side Deep Web Data Extraction

Clustering E-Commerce Search Engines by Q. Peng, W. Meng, H. He, C. Yu

Common Information Environment Seeks To Reveal the Hidden Web,13927,1195901,00.html

Crawling the Hidden Web by Sriram Raghavan and Hector Garcia-Molina

Creating Intelligence from Big Data

Current Awareness Discovery Tools on the Internet

Data Extraction and Label Assignment for Web Databases

Deep Web - Exploring the Secrets of the Hidden Internet by Marcus P. Zillman, M.S., A.M.H.A., - 23 minutes - Internet/Technology Channel

Deep Web Navigation in Web Data Extraction

Desperately Seeking Web Search 2.0

Digging Deeper into Deep Web Databases by Breaking Through the Top-k Barrier

DigiCULT Thematic Issue 6
Resource Discovery Technologies for the Heritage Sector, June 2004
Download Thematic Issue 6:Link HiRes .pdf (4,9 MB)

Efficient and Effective Metasearch Project

Efficient Deep Web Crawling Using Reinforcement Learning

Experiences In Crawling Deep Web In The Context Of Local Search by Dheerendranath Mundluru and Xiongwu Xia

Graph Structure in the Web

Grey Literature

Grey Literature Network Service (GreyNet)

Information Retrieval and the Semantic Web by Tim Finin, James Mayfield, Clay Fink, Anupam Joshi, and R. Scott Cost

In Search of the Deep Web

Invisible Web Gets Deeper

Invisible Web Revealed

IR and IE on the Web - PhD and MSc Dissertations

JEP: The Deep Web

LLRX: Book Review: The Invisible Web

LLRX: Deep Web Research

LLRX: Deep Web Research 2005

LLRX: Deep Web Research 2006

LLRX: Deep Web Research 2007

LLRX: Deep Web Research 2008

LLRX: Deep Web Research 2009

LLRX: Deep Web Research 2010

LLRX: Deep Web Research 2011

LLRX: Deep Web Research 2012

LLRX: Deep Web Research 2013

LLRX: Mining Deeper Into the Invisible Web

LLRX: ResearchWire: Exposing the Invisible Web

Metadata? Thesauri? Taxonomies? Topic Maps! by Lars Marius Garshol

Mining Newsgroups Using Networks Arising From Social Behavior

Mining the Deep Web: Search Strategies That Work by Lee Ratzan

Mining the Peanut Gallery: Opinion Extraction and Semantic Classification of Product Reviews

Mining Topic-Specific Concepts and Definitions on the Web

Net Plan Builds in Search by Kimberly Patch

Online or Invisible?

OntoMiner: Bootstrapping and Populating Ontologies From Domain Specific Web Sites

OpenIndex - Creating a Public Internet Index

Out-googling Google: Federated Searching and the Single Search Box

PhysicsWeb: The Physics of the Web

Publications about Web Analysis, Web Search, Citation Indexing, Digital Libraries, Machine Learning, Neural Networks [Steve Lawrence, Google Labs]

QProber: Classifying and Searching "Hidden-Web" Text Databases

Research Beyond Google: 119 Authoritative, Invisible, and Comprehensive Resources

Researchers Map of the Web

Scientific American: Featured Article: The Semantic Web

Search Engine Meeting

Search Engine Technology and Digital Libraries

Searching the Deep Web by Alex Wright

Searching the Deep Web

Searching the Deep Web - Video

Searching the Internet (White Paper, Audio and Video)

Search Interfaces on the Web: Querying and Characterizing by Denis Shestakov

Seeing through the 'invisible' Web

Semantic Web Content Accessibility Guidelines for Current Research Information Systems (CRIS)by A. Lopatenko

Structured Databases on the Web: Observations and Implications

Testbed for Information Extraction from Deep Web

The Deep Web: Semantic Search

The Deep Web: Surfacing Hidden Value by Michael K. Bergman

The Future Of News: The Digital Information Librarian

The Hidden Potential of the Web,13927,1195901,00.html

The Invisible Web by Chris Sherman

The Invisible Web: What it is, Why it exists, How to find it, and Its Inherent Ambiguity

The Invisible Web: Where Search Engines Fear To Go

The Ultimate Guide to the Invisible Web

The Virtual Private Library(TM) and The Deep Web Video by Melissa Barker

Timeline of Events Related to the Deep Web

Topological Measures and Maps Of the Web

Toward the Semantic Deep Web by James Geller, Soon Ae Chun, and Yoo Jung An

Towards Automatic Incorporation of Search Engines Into A Large-Scale Metasearch Engine

Traffic-Based Feedback on the Web by Jonathan Aizen, Daniel Huttenlocher, Jon Kleinberg, and Antal Novak

Travel Industry and Deep Web: Exclusive Interview with Marcus P. Zillman

UMBC - AgentNews

Understanding Metadata

Using the Internet As a Dynamic Resource Tool for Knowledge Discovery

Web Characterization Activity

Web Data Extractors White Paper Link Compilation

Web Pages Search Engine Based on DNS by Wang Liang, Guo Yi-Ping, and Fang Ming

WebScales: Towards a Highly Scalable Metasearch Engine

What Is the Deep Web? A WhatIs Podcast 15 Minute Interview with Marcus P. Zillman

What is the Invisible Web? A Crawler Perspective by Natalia Arroyo, Laboratorio de Internet

Why the Deep Web Needs the Semantic Web by Jennifer Zaino

Wikipedia – Deep Web

WISE-Cluster: Clustering E-Commerce Search Engines Automatically by Q. Peng, W. Meng, H. He, C. Yu

Yahoo and the Deep Web


Digital Libraries- Cross-Database Search: One-Stop Shopping

Search Tools Reports: Searching for Text Information in Databases

The Right Solution: Federated Search Tools by Roy Tennant

UK Web Archiving Consortium


Entrez - The Life Sciences Cross-Database Search Engine
EnergyFiles - Subject Pathways

FDsys -  Search Across Multiple Government Databases

King County Library System

NLM Gateway Search

SUMSearch 2

Scirus – Scientific Information Only

The Metasearch Infrastructure Project


Bright Planet – Deep Web Intelligence


Cross Database Engine for PHP

Dieselpoint Java Search and Navigation Software

DbVisualizer - The Universal Database Tool

DTIC Multisearch – Information for the Defense Community

Dublin Core Metadata Initiative (DCMI)

EEVL Xtra - Cross Database Search

Gold Rush - Database Search Tool


MetaSearch Initiative

mod_oai Project - Getting OAI-PMH For Free


Peter's PolySearch Engines

PBCore - The Public Broadcasting Metadata Dictionary

Registry of Library Knowledge Bases

Search Federal Research and Development

SRU - Search/Retrieve via URL

The Flamenco Search Interface Project

The GeneaNet Cross-Database Search & Alerts

VIAF: The Virtual International Authority File


ALPINE Network - SourceForge: Project

An Efficient Scheme for Query Processing on Peer-to-Peer Networks

Azureus - Vuze Java Bittorrent Client


Between Rhizomes and Trees: P2P Information Systems by Bryn Loban


BitTorrent Headquarters

Bit Torrent Official Site and Search Engine


BotSpot(R): File-sharing Bots

Coral - The Coral P2P Content Distribution Network

Capn's PHP Gnutella Search

Crackle - Stream On

Current P2P Search Search Implementations - P2P Networks

Deepnet Explorer - P2P/RSS-ATOM Web Browser

Distributed Search Engines

Distributed Search in P2P Networks

dushare - Real Time P2P Transfers

FAROO - P2P Web Search

FilesOverMiles - Browser to Browser File Sharing (P2P)


Free Haven Project

Frost Project - Freenet Messaging and File Sharing Client

FuzzBox: Tangent Research Artificial Intelligence and Robotics

GNUnet - GNU Project - Free Software Foundation (FSF)

GRACE - GRid seArch and Categorization Engine

Grid, Distributed and Cloud Computing Resources

GNU GRUB – Multiboot Boot Loader

Ian Clarke's Blog

IM and P2P Threat Center


International Workshop on Peer-to-Peer Knowledge Management (P2PKM)

Internet Movie Database (IMDb)

isoHunt - IRC and Bit Torrent Search Engine

Kademlia: A Peer-to-peer Information System Based on the XOR Metric


Lphant - The Full P2P Solution

MoleSter - A Tiny File-Sharing Application


MysterNetworks - The Evolution of Peer-to-Peer

Open Directory - File Sharing

Open Directory - MP3 Search Engines

OpenNap: Open Source Napster Server

P2P and the Future of Private Copying by Peter K. Yu, Michigan State University College of Law

P2PNet - Updated P2P News

P2P News from Topex

PeerMind - P2P Monitor

Peer-To-Peer Wikipedia

Peer to Peer File Sharing - P2P Networking


Port Knocking

PowerFolder - P2P Whole Folder Synchronization

Rodi - Tiny P2P Client/Host



Slyck - File Sharing News and Info


Super-Peer-Based Routing and Clustering Strategies for RDF-Based Peer-to-Peer Networks

Swarm - A Transparently Scalable Distributed Programming Language

The Anthill Project

The Pirate Bay - BitTorrent Tracker

The Freenet Project

The Peer-to-Peer Weblog

The Role of Peer to Peer File Sharing in Law Firm Marketing by Andy Havens


Torrent Reactor

Tranche Project - Secure P2P for the Scientific Community

Tribler - A Social Community That Facilitates Filesharing Through P2P


UltraTorrent - Ultra Torrent Search Engine

Understanding BitTorrent: An Experimental Perspective by Arnaud Legout, Guillaume Urvoy-Keller, and Pietro Michiardi

Videora - Personal Video Using P2P and RSS


YaCy - Distributed P2P Based Web Indexing and Anonmymous Search Engine

Yahoo! Directory Peer-to-Peer File Sharing

YAPPERS: A Peer-to-Peer Lookup Service over Arbitrary Topology

YouServ - A P2P (peer-to-peer) Web Hosting/File Sharing System


Zilok - Peer To Peer Rental Marketplace


Deep Web

Deep Web and Darknet - What Lies Beyond the Surface of the World Wide Web – The Colin McEnroe Show On WNPR

From Theory To Practice - Bielefeld Academic Search Engine

Gumshoe Librarian

Searching the Internet and the Invisible Web Video

The Deep Web

The Deep Web and Darknet - What Lies Beyond the Surface of the World Wide Web

The Virtual Private Library(TM) and The Deep Web Video by Melissa Barker

RESOURCES - Deep Web Research (top)

African Development Bank Group (AfDB) - Statistics

AnkaSearch - Meta Search and Deep Web Search Desktop Tool

A Roadmap for Web Mining: From Web to Semantic Web

Asian Development Bank (ADB) - Economics and Statistics


Biznar - Innovative Business Research Search Engine

Bot Research

BrightPlanet – Deep Web Intelligence

Catalog of U.S. Government Publications (CGP)

Cazoodle - Search, Integrate, and Organize -- The Real World

COLLATE - Collaboratory for Annotation, Indexing and Retrieval of Digitized Historical Archive Material

Comet Way

CompletePlanet - 70,000 Databases and Speciality Search Engines

Creative Commons RDF-Enhanced Search

Cyber Cemetery

Cybermetrics - First Generation Tools - Invisible Web

Data Mining Resources

DeepDyve - Deep Web Search Engine Blog

Deep Web Research Resources

Deep Web Search

Deep Web Technologies

DigiCULT Resources - Resource Discovery & Information Retrieval

Directory Resources

eFinancial Bot Deep Meta Search Engine

eGreenBot - Green Resources Search Engine

eHealthcare Bot Deep Meta Search Engine

eMarketing Bot Deep Meta Search Engine


Engineering Village 2

Eurostat - Your Key To European Statistics

Hakia - Search For Meaning

Falcons Semantic Web Search Engine

Federated Search Blog

Find Articles

FindThatFile - Comprehensive Internet File Search

Freely Accessible Databases for the Public

Ghostscript, Ghostview and GSview

Goldfire(R) - Optimal Decision Engine

Google Fusion Tables

Google Scholar

HighWire Press - Largest Repository of Free Full-Text Life Science Articles in the World


Images for the Deep Web


Instant Information Systems

Intelligence Center

Intelligence Competence Center - ICCrawler

International Monetary Fund (IMF) - Data and Statistics

Internet Archive

Invisible Library

Kapow Web Collector

Karma - Data Integration Tool

KDnuggets: Data Mining, Web Mining, and Knowledge Discovery Guide

Kngine - Web 3.0 Search Engine Designed to Provide Meaningful Search Results

Knowledge Discovery

Large-Scale Deep Web Integration: Incomplete Bibliography

Librarians' Index to the Internet

Linked Data - Connect Distributed Data Across the Web

LinkingOpenData - W3C SWEO Community Project


Mamma - Deep Web Search Engine

Mappa.Mundi Magazine

Mednar - Innovative Medical Search

Microsoft Bing Web Search Research and Patents

Mining the Deep Web for Economic Data

News Group Search

New Zealand Digital Library

NM Incite – Know The Customer

OAI-PMH Implementation Guidelines - Conveying rights expressions about metadata in the OAI-PMH framework


OECD.StatExtracts - Complete Databases Available Via OECD's iLibrary

OneLook Dictionary Search

Open Archives Initiative

OpenIndex - Creating a Public Internet Index

Open Source Intelligence

QProber: Classifying and Searching "Hidden-Web" Text Databases - PERSIVAL Project

Plagium - Plagiarism Tracker and Checker

Platfora - Clarity From Big Data

Recommended Gateway Sites for the Deep Web

SAO/NASA Astrophysics Data System (ADS)

Science Accelerator - Search Key Resources from DOE OSTI


Science and Technology Sources on the Internet

Scientific and Technical Information Network (STINET)

Science Commons - FirstGov for Science - Government Science Portal - Deep Web Search Engine

Scirus - Search Engine for Scientific Information

SDARTS - A Protocol and Toolkit for Metasearching

Social Buzz Bot

STN International - Databases in Science and Technology

Swoogle - Semantic Bot

TechDeepWeb - How-To Guide to the Deep Web for IT Professionals

TechXtra - Indepth Academic and Scholar Search

Testbed for Information Extraction from Deep Web

The Deep Web from WebLens

The Invisible Web

The World Bank - Data

THOR: Deep Web Data Extraction

Those Dark Hiding Places: The Invisible Web Revealed

TOR Project – Anonymity Online

TRID - The TRIS and ITRD Database


Twitter/Search #deepweb

UNdata - Data Access System To UN Databases

UNESCO Information Services - Databases

Useful Tips and Tools to Research the Deep Web

Wall Street Executive Library

Web Data Extractors

Web Farming


Web Intelligence Consortium

Web IR & IE

WebScales: Towards a Highly Scalable Metasearch Engine

Welcome to the Deep Web: The Internet's Dark and Scary Underbelly

WTO Statistics Database

Zaba Search – Free People Search and Public Information Search Engine

Zakta - Personal and Social Deep Web Search Engine

RESOURCES – Semantic Web Research (top)

4Store - An Efficient, Scalable and Stable RDF Database

Analyzing Social Networks on the Semantic Web

DARPA Agent Markup Language

DBin Project - Semantic Web P2P and/or Semantic Newsgroup Client.

DERI International - Digital Enterprise Research Institute

Digital Object Identifier (DOI)

Falcons Semantic Web Search Engine

FOAF Project - A Semantic Web Application

Foundation for Intelligent Physical Agents (FIPA)

GistWeb - Gist of Any Web Page Actual Content

Go3R - Knowledge Based Semantic Search Engine To Avoid Animal Experiments

GoodRelations Vocabulary - Semantic Web Based eCommerce

hakia - Search for Meaning

HP Labs Semantic Web Research

Infomesh's Semantic Web Introduction

International Journal of Metadata, Semantics and Ontologies (IJMSO)

International Journal on Semantic Web and Information Systems (IJSWIS)

Jena – A Semantic Web Framework for Java

Journal of Biomedical Semantics

Journal of Web Semantics

Journal of Web Semantics: Preprint Server

Knowledge Discovery


Language Engineering for the Semantic Web: A Digital Library for Endangered Languages

Linked Open Data from the New York Times

Magpie - The Samatic Filter and Tool For the Semantic Web

MetaData at W3C

MindRaider - Semantic Web Outliner


OASIS - Advancing eBusiness Standards

Ontology Matching

Ontology Metadata Vocabulary (OMV)

O'Reilly's Semantic Web Primer

Potential Advantages Of Semantic Web For Internet Commerce by Yuxiao Zhao and Kristian Sandahl

pOWL - Semantic Web Development Plattform

Practical Semantic Analysis of Web Sites and Documents

RDF Context Tools

RDF - Resource Description Framework

Rules and Rule Markup Languages for the Semantic Web - RuleML-2003 - Interlinking the Web of Data

SAO/NASA Astrophysics Data System (ADS)

Semantic Interoperability of Metadata and Information in unLike Environments (SIMILE)

Semantic Knowledge Technologies and Language Computation

Semantic Routing BOF - The Semantic Web Community Portal

Semantic Web Activity Statement

Semantic Web Application Platform - SWAP

Semantic Web for AURIS-MM

Semantic Web Primer for Object-Oriented Software Developers

Semantic Web Publications

Semantic Web Roadmap

Semantic Web Search Engine (SWSE)

Semantic Web Services Challenge

Semantic Web - The Voice of Semantic Web Technology

Semantic Web W3C

SenseBot - Semantic Search Engine That Finds Sense On the Web

SIMILE Project - Semantic Interoperability of Metadata and Information in unLike Environments

Simile Widgets – Free, Open-Source Data Visualization Web Widgets and More

Sindice - The Semantic Web Index Project Info - OWL API

Swoogle - Semantic Bot

SWRL: A Semantic Web Rule Language Combining OWL and RuleML

The Cover Pages

The ontoprise(R) GmbH

The RDF Query Language (RQL)

The Semantic Web: An Introduction

The Semantic Web By Tim Berners-Lee, James Hendler and Ora Lassila

The Semantic Web In Breadth

The Semantic Web Is Your Friend

Transforming and Enriching Documents for the Semantic Web by Dietmar Roesner, Manuela Kunze, Sylke Kroetzsch

uClassify - Free Text Classified Web Service

UDDI - Universal Description, Discovery, and Integration

Watson Web - Exploring the Semantic Web

Web Semantics: Science, Services and Agents on the World Wide Web

Web Service Modeling Ontology

Wilbur Toolkit for Semantic Web Programming

World Wide Web Reference Semantic Web

Yahoo Groups - SemanticWeb

Bot and Intelligent Agent Research Resources and Sites (top)

1st Spot

80legs - Powerful and Economical Service Platform for Crawling and Processing Web Content

Agent Construction Tools



Agent Model Yields Leadership

Agent Portal AI


AgentSheets - Authoring Tool to Create Agents

Alarm Growing Over Bot Software by Robert Lemos


Android World

Applied Soft Computing

Article Search API - New York Times Articles 1981 to Present

B.4.1 Search Robots - The Robots.txt File

Bookmach - Track Your Favorite Subject Using Sticky Zine and Blog Search

BotHunter - Passive Network Monitoring Tool

Bots, Blogs and News Aggregators


Build a Web Spider on Linux - A Simple Spider and Scraper Collects Internet Content

Cetus Links - Mobile Agents


Connotate - Intelligent Agent Technology and Competitive Intelligence Tools

cQuery - Content Query Engine

Data Mining Resources

DataparkSearch Engine - Full-Featured Open Source Web-Based Search Engine

Deep Web Research

Design of a Parallel and Distributed Web Search Engine by Salvatore Orlando, Raffaele Perego, and Fabrizio Silvestri

Dictionary of Algorithms and Data Structures

Eliza - The Original ChatterBot

FAME (Facilitating Agents in Multiculture Exchange)Project

File Information Tool Set (FITS)

Foundation for Intelligent Physical Agents


GeneSys Middleware

Google Guide

iMacros(TM) - Browser Based Macro Recorder and Intelligent Agent

Imagination Engines

Indexing Robot Crawler Checklist

Information Retrieval Intelligence

Institute for Human and Machine Cognition (IHMC)

Intellexer - Custom Built Search Engines, Knowledge Management Tools, Natural Language Processing

Intelligent Information Systems Research Laboratory

International Journal of Agent-Oriented Software Engineering (IJAOSE)


Kngine - Semantic Search and Answer Engine

Knowledge Discovery

Koders - Source Code Search Engine

LAIR - Laboratory of Applied Informatics Research

List of User-Agents (Spiders, Robots, Crawler, Browser)

Minimal-Intelligence Agents for Bargaining Behaviors in Market-Based Environments by Dave Cliff and Janet Bruten

MIT Media Lab: Software Agents

Modelling and Mining of Network Information Systems

Mozenda Web Agent Builder - Web Data Extraction



OpenKapow - Serving Mashups For the Long Tail of the Web

Open Source Web Information Retrieval (OSWIR05)

Oxyus Search Engine

Robots.txt Checker

Robots.Txt Checker - Validator for Robots.txt Files

Robots.Txt - Robots Exclusion Standards

Searchbots - Uniquely Searching the Internet

Search Engine Robots

Search Engine Watch News

Search Tools - Information Guides and News

SeerSuite - CiteSeerX Toolkit

Semantic Indexing and Search

Semantic Web


Siri - Your Virtual Personal Assistant

Smarter Bots

SocSciBot - Social Sciences Link Analysis Research

Spidering Hacks

Spinn3r: RSS Content, News Feeds, News Content, News Crawler and Web Crawler APIs

Structure and Interpretation of Computer Programs - Video Lectures by Hal Abelson and Gerald Jay Sussman

Supybot, A Superb Python IRC Bot

Swoogle - Semantic Bot

TBot - Windows Live Messenger Translation Bot

TextRunner Search - Searches Hundreds of Millions of Assertions Extracted from 500 Million High-Quality Web Pages

The Intelligent Software Agents Lab

The Lemur Toolkit - Language Modeling and Information Retrieval Research

The Search Engine Project (TSEP)

The Simon Lavern Page

The Web Robots Pages

TSEP - The Search Engine Project

UMBC AgentWeb

UMBC eBiquity

Webbot - the W3C libwww Robot

Web Curator Tool (WCT)

Web Data Extractors - White Paper Link Compilation

Web Intelligence Consortium

Web IR & IE

WolframAlpha Computational Knowledge Engine - Trillions of Pieces of Curated Data and Millions of Lines of Algorithms

Zakta - Personal and Social Deep Web Search Engine