Apple’s Darwin team has released the source code for Darwin 7.0. According to Apple, “these sources correspond to Mac OS X 10.3, and are available via the web. Also, the CVS repository has been updated for gcc, gdb, cups, efax, gimp-print, tcl, Rendezvous, StreamingServer, and HeaderDoc.” Darwin is one of Apple’s open source projects and is the core operating system of Mac OS X.
