OCTGN is described as '(Online Card and Tabletop Gaming Network) is a virtual table top with an integrated player lobby and chat system that supports custom card and board games'. There are three alternatives to OCTGN for a variety of platforms, including Mac, Windows, Linux, Self-Hosted solutions and Android. The best alternative is Wagic, which is both free and Open Source. Other great apps like OCTGN are Infinity Wars (Freemium) and Cockatrice (Free, Open Source).
Delve into a world of shattered realties and explore the factions that seek to dominate them. Pledge your allegiance to one of the eight distinct factions or play to your style by mixing and matching commanders in the name of victory.