BigFug (an active FreeFrame plugin developer) has released a beta of the After Effects Freeframe Host. It’s, well, free while in beta. The full version will cost money, however this money will let you run loads of free and commercial plugins. I’m not sure how this implementation differs from Pete Warden’s AFX Freeframe Host, as I don’t have it installed at the moment. But I shall do some testing and see how they stack up.
If you want to do some Freeframe testing of your own, here are some notable gratis ones to get you started:
For an example of the incredibly expensive ones commercial plugins available, check out VJFX FreeFrame Pack v2.0. 50ish plugins for 75 euro, those capitalist pigs!