lathe simulator

Does anyone know of a good simulator for G code on a lathe? We have many different cnc lathes in the shop. Most of them are Fanuc, but with slightly different formats, and we also have Okuma. Most of our programs are hand written line by line. I would like to find some type of software that we can copy the program into and run the code to prove it out on a simulator before running it through the machine. We also use a lot of can cycles as well, so the simulator would need to be compatible with that as well. Not sure if this is the right forum to ask this question or not. I would prefer to just have a simulator and not an entire cam system. Thanks ahead of time for any suggestions, thoughts and tips.