Donation to TeX

I donated $20 each to TUG and MikTeX. I love TeX/LaTeX!
@ $q(t \cdot \pi)$

Donation to TortoiseSVN

I share all my research documents and code via Subversion (SVN). And for the windows machines I use TortoiseSVN, a wonderful piece of software. Today, being in a good mood, I donated US dollars to the developers.
Keep up the good work TortoiseSVN!