OnOne Software, one of the premiere Photoshop Plug-In makers is offering an EXCELLENT FREE version of their Photographic Effects Plugin software for Photoshop. On the same page, they also offer several presets for Lightroom, Aperture, and Camera Raw.
This is FREE, people! And the effects and interface are very flexible and very cool!
Check them out at http://www.ononesoftware.com/free/