Hmm. I'd like to link the source for your mod on the mod list. However, the main problem with that currently is that I'd have to link a particular version only or would have to change the link every time a new version is released and brought to my attention (which can't happen).
I was wondering, if you're interested enough in the linking of the source alongside the linking to this thread, would you perhaps either create a github or a page on dropbox for the sources? If you're not willing to go that far, it's fine.
Aside from that, adding this to the list.
Keep up the great work!
I just realized that both this mod and mutant creatures give you an urge to extract the zip file and move the folders to mods, but you shouldn't.
In the end, you should have the AnimationAPI v1.0.0.zip and Mutant Creatures v1.3.4 mc1.5.2.zip directly under mods, and both zip files will have a mods folder inside of them, but it doesn't matter, they load perfectly.