Matt Riddell of VentureVoIP is always informative and a great read. This morning I see that he has posted an article listing 39 Free Soft Phones. What a great resource! He goes so far as to only list those that don’t require some sort of registration to download. Best of all he clearly indicates platform support for each program.
My two favorites, Counterpath’s X-Lite and PhonerLite, made the list. PhonerLite is notable for being one of the few with support for the G.722 wideband codec. (Am I not some sort of one-note instrument?)