SIMPLETRON is a simple, but quite powerful 'computer'. It runs programs written in the only language it directly understands, that is, Simpletron Machine Language. This is a good place to start for beginner programmers as its very simple to grasp yet advanced programs can be written in a style similar to Assembly language.
That's a quote from the readme file which accompanies my version of the Simpletron simulator. The past week I have been working at making my own version of this application. This is the most complicated program I have ever done. It's written in C++ and I'd like to open it to the community to give it a bash. Obviously this is just for fun. Maybe it can even help someone

Can be found here!