Final Cut Pro X, along with Motion 5 and Compressor were released by Apple today.
Alongside Apple’s new products we have released FxFactory 2.6.
This version of FxFactory makes our most essential visual effects available in Final Cut Pro X and introduces support for Motion 5.
More than 140 effects, generators and transitions from FxFactory Pro are now available inside Final Cut Pro X. The upgrade is free for current FxFactory Pro customers.
All our plug-ins continue to be available in previous versions of Final Cut Pro and other hosts, including the new Motion 5.

[...] Cut Pro X currently only has limited support for third-party effects plug-ins with FxFactory being among the first. Expect more [...]