A windows module tracker which can save a variety of different modules ( .it, .mod, .s3m, .xm) and open even more. MPT has its own native module type (.mptm), can save midi files, export audio as .wav, and has other interesting features such as VST support.
modplug has some quirks in its audio reproduction... so if you use it, expect to be harassed by other BotBrs for your n00bitude.
^not only that, it saves in their very own and INCOMPATIBLE .mod format making playback "shaky" and weird on standard players. So if you think this is a good tool to compose, let people know you use so that they find this tracker to play back or ignore you for being n00b xD
always always use "compatability export" and don't do 64 channels or VSTs in your .mod, listen to your track in xmplay before submitting and you will probably be ok