Since the OSDK is getting bigger and bigger, I guess it deserved a little bit more than the existing page, so I took a bit of time to put a half decent page about it, and its own subdomain:
http://osdk.defence-force.org
I will at some point put all the new releases, including the source code archive on this new place.
If you know of some Oric projects made with the OSDK, please inform me so I can extend the list.
Thanks