Opponents to play against with the new TabuTronic software include.

Engines
Bitjump, Critter, Demolito, Glaurung, LC0, Maia, Open Tal, Pawny, Pendone, Stockfish Tarrasch Toy Engine, Telel64.

Avatars
Anderson, Botvinnik, Bykova, Capablanca, Carlsen, Fischer, Kandau, Menchik, Petrosian, Rubinstein, Staunton, Steinitz, Tal, Zukertort.

ROMS
Amsterdam, Dallas, MM4, MM5, Rebel 5, Roma32.

As MessChess is used with this software, you can add all the additional ROMS available.