dMagnetic is an interpreter for classic text adventure games by Magnetic Scrolls, such as "The Pawn" or "The Guild of Thieves".
Mono is an open source implementation of Microsofts .NET Framework, which in turn is meanwhile based on the ECMA standards for C# and the Common Language Runtime. Mono provides its own C# compiler, and a JIT/AOT-based VM. It adds true runtime cross-platform support by providing Gtk/Cairo, OpenGL, LDAP, and POSIX bindings, and further integration with Wine. Mono runs on Linux, BSD systems, MacOS, PS3, Wii, Android, x86/amd64, PowerPC, Sparc, ARM, Alpha systems. Besides C# 4.0-6.0 support, it can
Parrot is a parser toolkit and virtual machine optimized for dynamic and scripting languages. It was designed for Perl6 but supports Lua, Ruby, Python, Pascal, Tcl and Scheme implementations. The Parrot runtime is register-based, garbage-collected, provides Unicode-aware strings, polymorphic object containers, allows dynamic opcodes, and its bytecode is commonly compiled from PIR (Parrot Intermediate Language), PASM (Parrot Assembly), or NQP (Not Quite Perl).
PWCT is an IDE for general-purpose visual programming. Its novice-friendly structuring wizards allow to command the underlying Supernova language and VM; which also becomes accessible for mofication. PWCT also supports Python, Harbour, C# and C. History versioning is a built-in feature, supperts imperative / procedural as well as squential object-oriented / event-driven and super server programming.