OpenTTCN in the Web
OpenTTCN in Finnish	http://www.openttcn.fi/
OpenTTCN Press Releases at PR.com	http://www.pr.com/...

Organizations
European Telecommunications Standards Institute (ETSI)	http://www.etsi.org/
ETSI's official TTCN-3 website	http://www.ttcn-3.org/
ETSI's Protocol & Testing Competence Centre	http://portal.etsi.org/ptcc/

Integrators
InterLab	http://www.interlab.net/