An object relational-mapping (ORM) library for Java
Easy Spider is a distributed Perl Web Crawler Project from 2006
Search engine and data mining applications and ClueWeb datasets.
An Open Source "product catalogue" that is customizable and versatile.
Decentralized Web Search Engine
Concise spatial query and representation system (c-squares)
Very configurable web downloader
An open source search engine with RESTFul API and crawlers
Open Source Intelligence Automation.