OK, I'm lazy... But why do work that's already been done!
So here are a few links for lists of Transalp links:

Transalp Webring: http://webring.com/hub?ring=transalp&list
Links from the "HansAlp": http://www.xs4all.nl/~hanzw/links.htm
Links from the Dutch TA club: http://www.transalpclub.nl/links.htm