Free internet metasearch engine which aggregates
A Distributed RESTful Search Engine
Object-based searching
Open source distributed and RESTful search engine
Digital Library Software
Open-source SERP API for AI, SEO & automation - Google + 5 more
Easy Spider is a distributed Perl Web Crawler Project from 2006
An Open Source "product catalogue" that is customizable and versatile.
Decentralized Web Search Engine
Concise spatial query and representation system (c-squares)
Bookmark manager web application
Very configurable web downloader
An open source search engine with RESTFul API and crawlers
Open Source Intelligence Automation.
A Free site search engine script build with PHP and Ajax.
Search The Web Using DuckDuckGo API PHP Framework