phpclasses.org is a total pain
I don't even want to know why phpclasses.org requires 2,000 clicks before reaching the .php file and why it requires registration and login. Maybe the person who did the web site has emotional problems and want every visitor to notice what she/he did. I'm sure I would not remember phpclasses.org if it was not for the irritation it generates.
An open, cross-platform journaling program.
A scientific plotting package.