OpenGrok is a fast and usable source code search and cross reference engine. It helps you search, cross-reference, and navigate your source tree. It can understand various program file formats and version control histories like Mercurial, Bazaar, Git, ClearCase, Perforce, SCCS, RCS, CVS, or Subversion. In other words, it lets you grok (profoundly understand) the source.
SourceHaven is a Software Configuration Management (SCM) system that was initially based on Subversion and adds an embedded Oracle database. A full-featured Web application is provided for all repository, user, and system administration needs such as managing permissions, users, backups, and so on. It supports all Subversion based clients and Subversion repository dump files. It aims to offer significantly improved performance, administration, and reliability.
ViewVC (formerly known as ViewCVS) is a Python/CGI-based system for viewing and interacting with Subversion and CVS repositories through your Web browser. It can browse directories, view changelogs, generate diffs, view arbitrary revisions, and display annotated ("blame") listings. It has full support for tags and branches, and contains a database-backed query system like Bonsai. It was initially based on the cvsweb work by Henner Zeller, but has been ported to Python and dramatically enhanced.
Origo is a software development and collaboration platform. It provides services that help develop software, such as source control management, issue tracking, wiki, release management, chat, blog, and forum. It uses an API to unify different tools and provides a common way to stay informed about changes in your projects. The API also allows you to integrate other tools into the plaform easily.