On my server, I prefer to add new sites as subdomains rather than folders. For example, I added put my bug tracker software at http://bugs.evancharlton.com/ rather than http://evancharlton.com/bugs . I prefer to do it this way because then I can move sites around to various servers as I see fit very easily (just change the DNS record, restart BIND and I'm good to go). Recently I added two new subdomains which aren't really linked anywhere, so I figured I'd bring some attention to them here.
First up, we have my documentation site, located at http://docs.evancharlton.com/ . It's simply a locked-down (for now) MediaWiki install that I'm using to add screenshots and descriptions about my various applications. Once it gets up and running, I'll open it up so that users can add tips or hints or whatever they see fit, but for now, I'm the only editor. It's time-consuming to update this, so progress will be slow for a few weeks until midterms settle down.
Another bit of software I've been toying around with is a continuous integration server, using the pulsetm software package from Zutubi. It's very nice software and a lot of fun to play with. For now, I only have a few projects set up to use it, but I'll be adding more as I have time. This will come in handy as I give more people commit access on my projects (and I also use it for some private team-based projects for school and work). One thing to note is that this site is not actually hosted on the same server as the rest of the site; due to pulsetm being written in Java and the fact that it will be compiling often, I offloaded the work to a spare computer I have in my apartment. This is the neat part about using subdomains and having control over my own domain records.
Anyway, feel free to browse these sites as you see fit; they're still in their infancy but I hope they become valuable resources like my WebSVN browser and my Bug Tracker.