Did you perhaps mean specifically the bodies and organizations within the U.N. (in Geneva)? But then, you would have searched for 'international' NGO's? Amnesty International has a presence here in Switzerland too.
A search on the yellow pages (Gelbe Seiten)
www.local.ch by using Keywords 'Menschenrecht' or 'Droit de l'homme' provides you with a small list of such foundations and NGO's.