Yioop! is a PHP-driven search engine which is open sourced, Yioop! It allows webmasters to run their very own search engine for keeping up with changes across the Internet and can be configured to crawl the whole Internet, or just a specific list of URLs and domains. Once crawled, site details are archived for later inspection.

Features of Yioop!:
- Manage user and roles
- Manage crawl archives
- Customizable crawl targets
- Graphic installer
- Results editor
- Easy embeddable into any existing site
- CLI tools
- Documentation

Requirements:
- PHP 5.3 or Higher
- Apache 2.2+ or lighttpd
- cURL library

What's New in This Version:
- This release adds image and video subsearch abilities and improves the formatting of Yioop on smart phones.
- Exact phrase searching is now done using only posting list information, rather than regex.
- Archive crawls can now, like Web crawls, exploit the presence of multiple queue_servers.
- Index iterators and summary lookup operations have been factored apart to better optimize Yioop search speed.
- Improvements have also been made to keyword suggestions.