CVSps is a command-line replacement for "cvs log"
and "cvs diff" that behaves the way those tools should.
Example: cvsps -q -g -r branchname -d 2003/09/04
will give you the diffs (and logs) of everything committed
to that branch since that date, and it will be quick about
it (you may have to update its cache though). Try that
with "cvs diff".
An open, cross-platform journaling program.
A scientific plotting package.