Sister operating system
Check out Inferno's sister operating system, Plan 9 (http://freshmeat.net/projects/plan9/).
Inferno (http://www.vitanuova.com/mkt/press/Inferno_overview.pdf) has had a port of acme (http://cm.bell-labs.com/sys/doc/acme.html) for quiet awhile now. Caerwyn (http://www.caerwyn.com/) has made a standalone version of Inferno with acme. (http://www.caerwyn.com/acme/)
An open, cross-platform journaling program.
A scientific plotting package.