MayBMS - A Probabilistic Database Management System

http://maybms.sourceforge.net/

MayBMS is a complete probabilistic database management system that has been implemented as an extension of Postgres. It supports a powerful, compositional query and update language. The MayBMS backend is accessible through several APIs, with efficient internal operators for computing and managing probabilistic data that leverage robust relational database technology.

MayBMS is open source and the source code is available under the BSD license.