Adding one I built myself. I write music for games, and the part I always dreaded was getting a track to actually loop cleanly in the various game engines. The app I made is called Loopsmith, and it works on Windows. You set the loop on the waveform, hear the seam repeat to confirm it loops properly, and then export marked WAVs or OGG. It also includes ready to paste snippets for Unity, Godot, and the web. And it can build the setup inside FMOD or Wwise for you. I think this should help get nice loops much faster.
There is a Demo version available to see how it works that comes with 5 exports.
Itch.io page: https://austinhaynes.itch.io/loopsmith