Feel free to share your extensions with or without the library!
If you are willing to contribute this code, I can integrate it in the next version of PocketFrog.
In any case, I am eager to see your work. Let us know, as I'm sure there is other people interested.
BTW, I am considering switching PocketFrog's license to LGPL, although I am unsure... What do you guys think? On the plus side, it's a well known license... On the other side, it is somehow restricting (and may deter people from using PocketFrog).