Most HPC clusters have many software packages available for various needs. Most installed packages are available as environment modules. You can find out about an installed software/module using the following command:-
module avail
This command will list all the installed software and modules in your cluster.
Use:module load <module/version> to load a modulemodule unload <module/version> when done.
Generally, use as few modules as possible at a time. Once you're done using a particular piece of software, unload it before you load another one to avoid incompatibilities.
If you cannot find a piece of software on the cluster, you can request an installation for cluster-wide use. Read through the Software Installation Policy page, and send your software request through the Software Installation Request form:
Contact hpc-help@ucdavis.edu with any other software issues.