Unique and very useful script
We wanted to set up a signup sheet for our monthly potluck suppers. I searched all over the Web, and this appears to be the ONLY script that works for this purpose. I had a few minor complaints--e.g., lack of flexibility in setting up which fields were required. However, I was able to deal with those with some minor hacking. Otherwise, this had everything I wanted.
An open, cross-platform journaling program.
A scientific plotting package.