Anti-Spam SMTP Proxy Server implements multiple spam filters
AWStats Log Analyzer
BOT IRC in Perl
Template-based code generation language.
Open-source automated grading of programming assignments
SuperDateTime Plugin for Squeezebox
Scalable, distributed monitoring system for high-performance computing
Perl modules for applications development
Similarity, Comparative genomic, Visualization, Eclipse RCP, SimiTri
Coordinated multi-repository super-projects for Git
Nagios/Icinga plugin that checks disk usage via snmp
Apply digital room correction and/or loudness to LogitechMediaServer
Apache Cayenne, Wicket, CXF, GWT, EJB examples as a framework