The main area for lots of starkits is the Starkit Distribution Archive:
http://mini.net/sdarchive/It lists many applications, demo's, and packages.
For development use, there's a 3.5 Mb "10-pack of extensions for Tclkit", called Kitten.
Another place to look for information about starkits, is the Tcl'ers Wiki [1], an actively maintained Tcl community resource. The Tcl'ers Wiki is based on Wikit [2] and is itself also a starkit, btw.
There are more and more applications using starkits, although most are likely to still refer to the old term, i.e. "scripted documents".