Just released a dead-nuts simple class for live shader coding in openFrameworks. The class utilizes watchman to notify you of changes to files within a certain directory—useful for externally editing shader files and seeing your changes reflected as soon as you hit save. Currently tested on macOS, but should work on any other OS that can build watchman & its dependencies.
Let me know if you guys have any suggestions, or (even better) submit a pull request! Cheers, and happy shading!