FFRend is a great opensource project by Chris Korda for realtime & rendering freeframes, more info at the FFRend homepage on Soureforge, and development notes at the FFRend blog.

IntrinsicFX plugins are tested in FFRend on PC and seem to be working fine, more extensive testing of all plugins is planned, but 3xT.

A few applications that support the FreeFrame plugin standard, with links to more info about their FreeFrame support:

Note! I'll get around to updating screenshots/versions and testing, some of these might be outdated now, stay tuned (working on this section) !

Modul8 (info from forum)

Isadora (FreeFrames in Isadora)

Salvation & SalvationMX

VJamm3

VDMX5

FrameRunner (Aftereffects Native Plugin/Host for using FreeFrame plugins inside Adobe AfterEffects)

VVVV (about FreeFrame support in VVVV)

FFRend FreeFrame Renderer (homepage)

Eyesweb (external info on FreeFrame support)

Livid Instruments Union & Cell DNA  (news on their FreeFrame support as of 2008)

Neuromixer AVMixer Pro & AVPlayer Touch (about FreeFrame support in AVMixer Pro)

Other apps: some more information can be found @ freeframe.sourceforge.net and community.freeframe.org.