I finally got around to releasing the code for TwitApps on my github account. There is no license attached to this code so it's in the public domain and anyone is free to do whatever they want with it. I don't guarantee it will be easy to get working, or that it will work at all on your server, but if you have any questions please don't hesitate to contact me and I'll do my best to help.
I've not provided much in the way of instructions at this point but I may add some next time I have a spare five minutes.
If you find a use for this code I'd love to hear about it so please let me know.