The CvsGui project is providing several high-end interface clients (WinCvs, MacCvs, gCvs) written in C++ using popular frameworks (MFC, PowerPlant, GTK+) with a scripting support via Python or TCL.
Ada Class Library - an object orientated library for Ada. Text search and replace. Scripting (small tool programs). CGI scripts. Execution of external programs (incl. I/O redirection). Garbage Collection. Extendended Booch Components. CD-Recorder
CVSweb-PHP offers a web interface access to a CVS repository. CVSweb-PHP was created for cases where a project still using CVS has no means of installing a CGI script on its web server, but where running a PHP script is an option.