XPSwiki: an Agile Tool Supporting the Planning Game (Sandro Pinna, Simone Mauri, Paolo Lorrai, Michele Marchesi, Nicola Serra) Abstract. We present XPSwiki, a tool supporting the XP practices for require-ment gathering and project management – user stories and the Planning Game. XPSwiki has been developed in Smalltalk using Squeak Swiki technology. It is accessed through the Internet in a user friendly agile way. XPSwiki keeps track of multiple projects, each with its releases, iterations, user stories, acceptance tests, and engineering tasks. It also manages teams of developers, who sign sto-ries and tasks, and who pair-program them with another team member. XPSwi-ki allows project tracking and documentation, and is at present in use among re-al software firms.