I am keeping inofficial debian-packages (binary+small debian-diff) of _unstable_ tin on
Use at your own risk and don't bug the Debian BTS.
Very good news reader.
I found it to be very stable, easy to use and with just the right amount of features. This software makes it very easy to download multi-part attachments and it handles loads (8000+) of headers without any problem. I love it!
An open, cross-platform journaling program.
A scientific plotting package.