Cactus is a general, modular, parallel environment for solving systems of partial differential equations. The code has been developed over many years by a large international collaboration of numerical relativity and computational science research groups and can be used to provide a portable platform for solving any system of partial differential equations.
Cajun is a program that allows you to turn any computer into a massive audio jukebox for your car or home. It uses LCD displays/keypads, and supports infrared remote controls. Soundcard output is delivered to your (car or home) stereo for amplification. The software supports a playlist and shuffle mode.
Catdoc is a MS Word file decoding tool that doesn't attempt to analyze file formatting (it just extracts readable text), but is able to handle all versions of Word and convert character encodings. A Tcl/Tk graphical viewer is also included. It can also read RTF files and convert Excel and PowerPoint files.
CD-Rchive2 is a complete revamp of the popular but now aged CD-Rchive program. It is intended to be used with cdrecord-ProDVD, cdda2wav, and mkisofs for the production of data and music CDs and data DVDs. Built in tools allow cloning of a complete CD or DVD and writing copies. A Boot Wizard will guide you through steps required to make a bootable CD or DVD, write the code, and compile a binary menu program which runs with isolinux. (If this software suddenly stops working, there is a good chance your cdrecord-ProDVD key has expired; get a new one from the site.)
The CDDB/CDDB_get Perl module gets the CDDB info for an audio CD. The included script was intended as a demo for CDDB_get, but over time it has gained powerful features like the ability to write to a database, offline mode, HTTP mode (including proxy), saving in standard XMCD format, and writing 'lame' commands.
centericq is a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!, AIM, IRC, MSN, Gadu-Gadu, and Jabber protocols. It allows you to send, receive, and forward messages, URLs, SMSes (both through the ICQ server and email gateways supported by Mirabilis), contacts, and email express messages, and it has many other useful features. An internal RSS reader and a LiveJournal client are also provided.
cgi-util is a fast, easy to use C library for creating CGI programs. Functions are available for initialization (parsing), grabbing fields (by string, integer, double or boolean value), embedding HTML files, and more. It accepts both POST and GET request methods and has extensive error handling.
CGI::Application is a Perl framework intended to make it easier to create sophisticated, reusable Web-based applications. This module implements a methodology which can make Web software easier to design, easier to document, easier to write, and easier to evolve. CGI::Application builds on standard, non-proprietary technologies and techniques, such as the Common Gateway Interface and Lincoln D. Stein's excellent CGI.pm module. CGI::Application judiciously avoids employing technologies and techniques which would bind a developer to any one set of tools, operating system, or Web server.