ProB is an animator and model checker for the B-Method (see the B Site Pages , B-Method site of Clearsy, or the B Formal Methods Virtual Library). It allows fully automatic animation of many B specifications, and can be used to systematically check a specification for errors. In addition to B, ProB now also supports CSP-M and Z. Part of the research and development was conducted within the EPSRC funded projects ABCD and iMoc, and within the EU funded project Rodin. Development is continued under the EU funded project Deploy and the DFG project Gepavas. ProB has been successfully used on various industrial specifications (e.g., from Nokia Research).