Description of App:
Trillian for Mac is a free messenger that makes it easy to chat with your friends no matter where they are. Use Trillian to connect to Facebook, Twitter, GTalk, AIM, Yahoo, and much more. As an added bonus, Trillian for Mac syncs beautifully with Trillian for iPhone when you're on the go!
Free or Paid:
Version Of OS X App Was Tested On:
This app is very accessible with VoiceOver. No problems setting it up or using it, for that matter.
If you're looking for a free, accessible IM/social networking client that can do a number of accounts for facebook, twitter, AIM, google talk, etc in one package, check this one out.