Mono profiler libraries Profiler libraries for Mono, used for profiling applications running on Mono. For details how to use them, please take a look at the mono manpage. Mono is a platform for running and developing applications based on the ECMA/ISO Standards. Mono is an open source effort led by Novell. Mono provides a complete CLR (Common Language Runtime) including compiler and runtime, which can produce and execute CIL (Common Intermediate Language) bytecode (aka assemblies), and a class library.