Currently working on improving the accessibility of PitchNet, an open source alternative to plug-ins like Melodyne. Thanks to CodeX got a preliminary version working in about an hour or so, but I'm not sure if I like my implementation. I'll probably end up releasing the code on GitHub anyways after I do a little more work, but here's the original repo in case anyone who actually knows what they're doing wants to take a crack at it: https://github.com/SessionLoops/PitchNet