RoboBridge is a free computer bridge software that simulates three human bridge players. It allows you to play some boards whenever you have time.
RoboBridge lets you compose your own convention card. Possible base cards to choose from: Acol, Standard American, SAYC, 2 over 1. Customize these cards with over 50 conventions: Stayman, Jacoby, Multi-Landy, Checkback Stayman, RKC, DOPI-ROPI, Puppet Stayman, Truscott, Multi, Flannery, Fourth Suit Forcing, Negative double, Support double, Support cue and so on.