...KB3 is based on the FIGARO reliability modeling language, suitable for describing CTMC (continuous time Markov chains), DES (discrete event simulation) models, and for automatic generation of fault trees. FIGARO is objet oriented, close to natural language and enables building libraries of reusable components (knowledge bases). Go to "Files" tab to download various Figaro based tools (Visual Figaro, KB3, YAMS), lots of examples and documentation.