Is there any way to install a C++ compiler or Ruby/Python interpreter on WinRT. (or is there any other way to program in a language beside JavaScript and beside online compilers and IDEs)
To be more specific: Can I program USING MY WinRT NOT FOR WinRT. SO can I open an app or notepad ON WinRT and than compile the code ON WinRT (NOT "FOR" but "using"). Thx.
You're looking for an IDE (integrated development environment) that would run on Windows RT (ARM based) devices and allow you to compile programs for other target platforms? While there're no technical restrictions for such an app, there don't seem to be any in the store at the moment. The only one to feature a Ruby interpreter seems to be InstantRuby, though it doesn't look like you could actually create a program with it.
There are multiple code editors already available though (in no particular order as I haven't tried any of them yet):