libmono-dev 1.1.12-0ubuntu2 (i386 binary) in ubuntu dapper

libraries for the Mono JIT - Development files
 Header files and static libraries for libmono and libmono-profiler-conv.
 .
 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 .NET CLR including compiler and runtime, which can
 produce and execute CIL bytecode (assemblies), and a .NET class library.