I don't know if this happens for everyone else, but I quite often find myself having to "tweak" existing libraries so that they are compatible or more performant with the Teensy. So, I started a github where I can store these modified libraries for others to find and use. If you have any contributions, please let me know.
https://github.com/Teensy-Compatible-Libraries
-Mark
https://github.com/Teensy-Compatible-Libraries
-Mark