PHPSecureSite is on it's early development but it is indeed a good job. I implemented the system on the admin section of my website in less than two hours. The flexibility and features are amazing and not having a front-end but explaining instead how to code one is a must if you know a little bit of PHP!! That means total integration with a website and that was exactly what I was looking. Thank you very much Erik.
An open, cross-platform journaling program.
A scientific plotting package.