CVSTrac implements a low-ceremony Web-based bug and patch-set tracking system for use with CVS, Subversion, or GIT. Features include automatic changelog generation, repository change history browsing, user-defined bug database queries, Wiki pages, and Web-based administration of the CVSROOT/passwd file. CVSTrac is a stand-alone C program that operates either as CGI or as its own Web server.
deal.II is a C++ library supporting the generation of complex adaptive finite element codes. It features locally-refined grids, various scalar and vector-valued finite elements, linear solvers of low and higher order, arbitrary mappings, and support for 1, 2, and 3D computations. It comes with extensive documentation and example programs showing the use of the library for modern finite element programs.
Code Librarian is a Web frontend to CVS repositories, conceptually a merge of Bonsai and ViewCVS/cvsweb. It allows browsing recent commits to the repositories monitored by date as well as browsing the repository by path as a tree of files and their revisions. Colored unidiffs are shown in popup layers one click away from any browse view, and the interface tries to be both clean and powerful, without scaring away the novice user.
Meld is a visual diff and merge tool. It integrates with most version control systems. The diff viewer lets you edit files in place (diffs update dynamically), and a middle column shows detailed changes and allows merges. The margins show location of changes for easy browsing, and it also features a tabbed interface that allows you to open many diffs at once.