PokerTH

PokerTH came out for PC in October 2006.

PokerTH is an open-source Texas hold 'em simulator that runs on Windows, Mac OS X, Linux, and Android. PokerTH is written in C++ using the Qt framework and allows for up to ten human players, with computer-controlled players filling in if there are not enough humans. Players can also play against other PokerTH users online.