[abestor]

I have no plans to do a Windows port myself, as I've no interest in using or developing for Windows anymore.

I'd be delighted if someone else would have a crack at producing something Boxer-like for Windows; however, while Boxer is opensource it's written in Objective C using OS X-native APIs, so a port would involve pretty much a total rewrite of every part of Boxer that's not DOSBox. Any such project for Windows would be better off using Boxer as a source of inspiration rather than a codebase.