Great, but one complaint
The thing I like best about this piece of software is that it doesn't have anywhere the number of dependencies as something like ACID. Very easy to set up. Just make sure you use the included .sql file to create indexes in the snort database or it'll be slow as hell. :)
My main gripe is that it totally broke when I turned off register_globals in my php.ini. :/ Now I have to go through the code and fix it.
An open, cross-platform journaling program.
A scientific plotting package.