nSRE is [yet another] web framework written in PHP and which I use for some of the web projects I've worked on.
Apart from being a pet-project, nSRE also has one other important thing that sets it apart from many of the others. It is seriously minimal, by design. It handles security, users and themeing but otherwise keeps well out of your way.
As you'd expect, nSRE is what is running behind Jhnet, along with a few other websites I've built. At the moment it is in a prettey developmental stage. While this doesn't mean it is unreliable, it does mean its mostly undocumented and doesn't have much of an easy to use front end. Most of the configuration is done by running functions on web pages.
Licence: GNU GPL v2
Status: In Development (Stable)
Download: netSys.tar.gz (Version 2.0.0)
Logo (SVG): netSysLogo.svg (Creative Commons Attribution, Share-alike)