Anti-Spam SMTP Proxy Server implements multiple spam filters
Fully Automate ANY Process with *Persistent* SSH/SFTP from One Host
Easy Spider is a distributed Perl Web Crawler Project from 2006
Mature SGBD in Perl with a web interface
Open Source Enterprise Wiki and Web Application Platform
Open Source SEO & SEM Text Creation Tools for free Article Writer
A complete multi-language developement stack for GNU/Linux