sentence: ironpython - python for .net and mono platforms jython - python coded in java parrot - virtual machine being developed mainly as the runtime for perl 6 , but with the intent to also support dynamic languages like python , ruby , tcl , etc. psyco - not an implementation , but jit compiler for cpython pypy - python ( originally ) coded in python , used in conjunction rpython , a restricted subset of python that is amenable to static analysis and therefore a jit .