Clutter OpenGL abstraction library

http://clutter-project.org/

Optimization library with support for COIN-OR CLP, CBC, and CGL

https://projects.coin-or.org/CoinMP

Manage color profiles to accurately color input/output devices

https://www.freedesktop.org/software/colord

Manage color profiles to accurately color input/output devices

https://www.freedesktop.org/software/colord

A convenience package to install the compat5x libraries

Convenience package to install the FreeBSD 6.x compat libraries

Convenience package to install the FreeBSD compat7x libraries

Convenience package to install the FreeBSD compat8x libraries

Convenience package to install the FreeBSD compat9x libraries

Compiler runtime library with Blocks support

http://compiler-rt.llvm.org/

Compiz Composite/Window Manager

http://www.compiz.org/

Feature-rich compositing window manager for X11

https://github.com/chjj/compton

Provide network access to local serial ports and make remote ports appear local

https://BSDforge.com/projects/comms/comserv/

Console based hardware monitor for BSD

Framework for defining and tracking users

https://github.com/ConsoleKit2/ConsoleKit2

Free Software Foundation's core utilities

http://www.gnu.org/software/coreutils/

The O\x27Reilly package of utility classes for servlet developers

http://www.servlets.com/cos/index.html

Document database server, accessible via a RESTful JSON API

http://couchdb.org/

Meta-port for the courier authentication library

http://www.Courier-MTA.org/authlib/

Courier authentication library base

http://www.Courier-MTA.org/authlib/

Userdb support for the Courier authentication library

http://www.Courier-MTA.org/authlib/

Courier implementation of Unicode Standard related algorithms

http://www.courier-mta.org/unicode/

RRDtool frontend for Courier statistics

https://www.arschkrebs.de/postfix/couriergraph/

User account information retrieval utility

http://www.arda.homeunix.net/store/

Configurable talking characters in ASCII art

http://www.nog.net/~tony/warez/cowsay.shtml

C++ port of the JUnit framework for unit testing

http://cppunit.sourceforge.net

CPU identification utility

http://www.ka9q.net/code/cpuid/

Password-checking library

https://sourceforge.net/projects/cracklib/

Free C++ class library of Cryptographic Primitives

https://www.cryptopp.com/

Interactive C program browser

http://cscope.sourceforge.net/

Feature-filled tagfile generator for vi and emacs clones

http://ctags.sourceforge.net/

BitTorrent Client written in C for FreeBSD and Linux

http://www.rahul.net/dholmes/ctorrent/

Automated unit testing framework for C

http://cunit.sourceforge.net/

Common UNIX Printing System

https://github.com/OpenPrinting/cups

CUPS backend for Canon USB over IP protocol

http://cups-bjnp.sourceforge.net/

Print using Google Cloud Print

http://www.niftiestsoftware.com/cups-cloud-print/

Fuji Xerox Printer Driver

http://www.fujixerox.co.jp/download/apeosport/download/c4300series/linux_module.html

Virtual printer for CUPS to produce PDF files

http://www.cups-pdf.de/

Helper that makes system-config-printer use PolicyKit

http://www.freedesktop.org/software/cups-pk-helper

CUPS backend for printing to Windows servers

http://www.cups.org/articles.php?L294

Non-interactive tool to get files from FTP, GOPHER, HTTP(S) servers

https://curl.se/ https://github.com/curl/curl

Cuse4BSD character device loopback driver for userspace

http://www.selasky.org/hans_petter/cuse4bsd/

Version control system

cvs-server only shell

CVS to Subversion Repository Converter

http://cvs2svn.tigris.org/

Tutorial and reference for CVS

http://cvsbook.red-bean.com/

Utility to generate changelogs and reports from a CVS repository

http://cvschangelogb.sourceforge.net/

Graph the life story of a file under CVS or RCS

https://web.archive.org/web/20181111235708/http://www.akhphd.au.dk/~bertho/cvsgraph/

Create patchset information from CVS

http://cvsps.sourceforge.net/

CVS patchsets

http://www.cobite.com/cvsps/