Rolz - Free dice-rolling tools for role-playing games.
Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat
Open Yahtzee - A cross-platform Yahtzee game.
Sorry App - Turn outages into opportunities
Kiriki - Kiriki is a dice game for Linux distributed by KDE, based on the popular analog dice game called Yahtzee. Designed to be played by as many as six players, participants have to collect points by rolling five dice for up to three times per turn.
Trivia for Slack - Fun team-building with 1000s of quizzes right inside Slack