Codestriker is a web application supporting online code reviewing, typically diffs generated by a Source Code Management system or plain unidiff patches. There are integration points with CVS, Subversion, Clearcase, Perforce and Visual SourceSafe.
Pith ("Perl-Implemented Test Harness") is a lightweight, application-independent framework for building and executing functional integration tests. It allows the test code to exist wholly independently from the testing platform.
Subversion PRS is a web-based tool to assist in peer review of code for projects using the Subversion version control system. It uses Perl, JavaScript, HTML, CSS, and MySQL.