Currently there are draft versions of the codec written on C, Go, Python and Tcl.
You can obtain development source code with
git clone git://git.cypherpunks.su/keks.git.
You can also use
anongit@master.git.stargrave.org:cypherpunks.su/keks.git,
anongit@slave.git.stargrave.org:cypherpunks.su/keks.git,
anongit@master.git.cypherpunks.su:cypherpunks.su/keks.git,
anongit@slave.git.cypherpunks.su:cypherpunks.su/keks.git,
git://git.stargrave.org/keks.git,
git://y.git.stargrave.org/keks.git,
git://y.git.cypherpunks.su/keks.git URLs instead.
Also there is Yggdrasil accessible address: http://y.www.keks.cypherpunks.su/.