Erlang Programming Language, including: Erlang (programming Language), Wings 3d, Ejabberd, Tsung, Mnesia, Yaws (web Server), Couchdb, Open Telecom Platform, Cean, Rabbitmq, Hibari (database)

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More info: Erlang is a general-purpose concurrent, garbage-collected programming language and runtime system. The sequential subset of Erlang is a functional language, with strict evaluation, single assignment, and dynamic typing. For concurrency it follows the Actor model. It was designed by Ericsson to support distributed, fault-tolerant, soft-real-time, non-stop applications. The first version was developed by Joe Armstrong in 1986. It supports hot swapping, thus code can be changed without stopping a system. It was originally a proprietary language within Ericsson, but was released as open source in 1998.