- bzfquery
- 
Contact a bzflag server and print the game status
- bzfs
- 
BZFlag game server
- caesar
- 
caesar ,
- cage
- 
Escher's impossible cage, for xscreensaver.
- canfield
- 
canfield ,
- carousel
- 
displays multiple images rotating in a circular formation
- castle-combat
- 
enclose land and destroy your opponent's castle
- ccurve
- 
self-similar linear fractals.
- cdbdiff
- 
program to operate cookie (fortune) database
- cdbsplit
- 
program to operate cookie (fortune) database
- celtic
- 
draws celtic cross-stich patterns
- cf2bmp
- 
convert Crimson Fields levels to BMP images
- cfclient
- 
X11 client program for crossfire servers.
gcfclient - gtk client program for crossfire servers.
- cfed
- 
a level compiler for Crimson Fields
- cfsndserv
- 
crossfire client sound server
- cgoban
- 
X11 Go Toolset
- childsplay
- 
Educational games for young children.
- chkfont
- 
checks figlet 2.0 and up font files for format errors
- chromium
- 
Slick Scrolling Space shooter
- circuit
- 
animates a number of 3D electronic components.
- circuslinux
- 
The clowns are trying to pop balloons to score points!
- civclient
- 
The client for the Freeciv game
- civserver
- 
The server for the Freeciv game
- ckifzs
- 
Verifies a QUETZAL/IFZS file
- clanbomber
- 
Bomberman game clone
- cloudlife
- 
a cellular automaton based on Conway's Life
- cmml-fortune
- 
generates a random valid CMML instance document.
- collect
- 
Collects separate included files into one file that uses pattern
blocks
- comet
- 
a mission editor for Crimson Fields
- compass
- 
draws a spinning compass.
- conqai
- 
Conquest AI override program
- conqoper
- 
Conquest operator program
- conqstrat
- 
modify Robot strategy tables
- conquest
- 
Conquest game
- cookietool
- 
program to operate cookie (fortune) database
- coral
- 
simulates coral growth, albeit somewhat slowly.
- corewars
- 
play corewars
- countmail
- 
countmail
- crack-attack
- 
multiplayer OpenGL puzzle game like "Tetris Attack"
- crackberg
- 
Lose your way wandering some height fields, and enjoy candy.
- crawl
- 
play the roguelike game of crawl
- cribbage
- 
cribbage
- crimson
- 
a hex-based tactical combat game
- critical
- 
Draw a system showing self-organizing criticality
- critter
- 
Space shootemup resembling Galaxian
- crossedit
- 
A map-editor for the game Crossfire.
- crossfire
- 
a multiplayer adventure and arcade game server
- crypto
- 
The Crypto Application
- crystal
- 
kaleidescope.
- csmash
- 
A table tennis simulation game