Bash on Rails is quote database engine (like http://bash.org/or http://bash.org.ru/) written with Ruby on Rails framework. Supports multiple moderators with different privileges, editing quotes, sorting quotes by rating, quote searching and RSS feed.
Perforins Bash is a "Quotes Management System" written in Perl. Users can submit chat quotes which will be checked by the administrator and then put into the database. It´s like the popular german-bash.org but open source!
envbot is an advanced modular IRC bot in bash. envbot supports SSL, IPv6, module loading/unloading on the fly, advanced access control and many more features.
jdbHub is a Direct Connect (DC) Hub written in Java with support for Java bot/plugin. No need of GUI (bash only user are welcome!). It has a complete series of tool for hub security. Yet stable, tested on an entire week of non-stop work, over 1000 users