Not a hardware project, but I have maintained an alternative CLI-based Particle Development solution for several years. This year I reimplemented it in Python and added full Particle Workbench compatibility:
heya! Yup, that’s an old project of mine! @rickkas7 made a much better version more recently that uses DMA, and isn’t as buggy as mine. But I always hoped someone would make it into a slightly-more-polished, goofy kickstarter or something, low-budget wifi walkie talkies or something.