Shape Service's IMPlus is one of the cool apps for the HTC Touch Pro, featuring access to AOL Instant Messenger, MSN, Windows Live, Yahoo, ICQ, Jabber, and Google Talk.
As the free counterpart to IM+ Push, this app allows you to chat on AIM, Google Talk, Yahoo, MSN, ICQ, and even MySpace.
KoolIM offers the ability to simultaneously use your Yahoo, AIM, MSN, Google Talk, ICQ, Gadu-Gadu and Xfire accounts.
Meebo allows you to log in to Yahoo, AIM, MySpace, MSN, Facebook, Google Talk, ICQ, Jabber and Myyearbook.
In addition to Yahoo, the site supports AIM, Facebook, MSN, ICQ, MySpace and Google Talk.
In addition to the camera, this one allows you to use AOL, Yahoo! and ICQ.