RootPrompt.Org points to a LinuxWorld article about X-oops and E-Xoops, two PHP-based object-oriented portal packages. It looks like both of their websites try really hard to look like *Nukes, which is unfortunate, but varlinux uses E-Xoops to look a little more unique.
Back in June I installed both PHP-Nuke and PostNuke on my Westhost (I’m quite happy with them) account while trying to find my geekblog voice. I liked the administration interface and it was set up great for a community weblog/news site, but it was missing something. Perhaps it was because it looked like every other *Nuke site out there. I tried a few non-default themes, as I was too lazy to create my own from scratch, but it still looked stock *Nuke to me. I downloaded Radio Userland in early July and fell in love with Aggregation and the more personal approach that the software allowed me to take to geekblogging.