SCID has more features than commercial chess software. It is also under active development.
Thanks to author. It is so useful software really!
More frequent updates of this page?
It's convenient getting email notifications about new versions so an up to date freshmeat page would be welcome.
As a long time SCID user I can't praise this program enough. It's full-featured, easy to use, well documented, fast and, of course, it runs on my platform of choice (Linux), which the commercial vendors seem uninclined to support. (SCID also runs on windows, for those so inclined.)
In any case, SCID has just about all the features of the commercial offerings and an author who listens to and implements feature suggestions all the time.
Hats off to Shane for an excellent piece of work.
An open, cross-platform journaling program.
A scientific plotting package.