From the homepage:
Cockatrice is an open-source, multiplatform program for playing tabletop card games over a network. The program’s server design prevents users from manipulating the game for unfair advantage. The client also provides a single-player mode, which allows users to brew while offline.
1 point
Yeah, Cockatrice is pretty cool, I use it a lot when I play online. It does take some getting used to with the layout though.