Note: Please see Modules, which is now our preferred method of providing locally-built software to the Institute, as well as its various labs and centers.
/usr/local is managed via a Stow system.
If you are looking for a specific piece of software you can list the directory /usr/local/stow. Some software is linked in with the stow command directly into bin,lib,man,sbin directories in /usr/local.
For RHEL hosts, the software will be moving from /usr/local to /opt/local to work around some issues with the root user and problems with NFS.