Best Referral Programs - A curated directory of startup referral programs
Cockatrice - Cockatrice is an open-source, multiplatform program for playing tabletop card games over a network.
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
Hearthstone - Pick up your cards and throw down the gauntlet!
GrowSurf - Referral software for B2C, FinTech, and SaaS companies.
XMage - XMage allows you to play Magic against one or more online players or computer opponents.