For typesetting papers, TeX is now available on pion, quark and lepton. All of the common macro packages used in physics are available. (The files are located in the directory /het/tex/macros.) There is an old guide to the PHYZZX macros and a sample harvmac preprint. The TeX previewer is xdvi. Learn to use it; save some trees. xdvi runs automatically when you double-click a DVI file from the File Manager.
FrameMaker is also available, but it's slow and you won't be likely to find many people to whom you can circulate your documents electronically.