To use the contributed binaries on CMU Linux systems (such as unix.andrew.cmu.edu or cluster Linux desktops), add the following to the top of your .bashrc (adjust for the shell you use). If you want to use mosh-server, note that it must be at the *top* of your .bashrc.
source /afs/club.cc.cmu.edu/contrib/etc/bashrc
To install a binary for use on the Contributed Binaries, download the source and all dependencies that are not already present, compile them one by one and install them in /afs/club.cc.cmu.edu/contrib/ with ./configure --prefix=/afs/club.cc.cmu.edu/contrib/ or whatever. Obviously you need to be able to write to /afs/club.cc.cmu.edu/ to do this, so you need to be a member of the Computer Club.
To request a binary to be added, email operations@club.
To get a list of things present in Contributed Binaries,
ls /afs/club.cc.cmu.edu/contrib/bin