http://www.macnn.com/articles/08/05/16/kekus.lensfix.for.aperture/
Kekus ships Aperture lens distortion plug-in
updated 04:00 pm EDT, Fri May 16, 2008
Kekus LensFix for Aperture
Kekus Digital says it is shipping a new version of its LensFix plug-in, now tailored for Aperture 2.1. The software is intended to correct lens distortion for a variety of cameras and lenses; over 500 combinations are supported, and users have access to "thousands" of presets. The software further supports 16-bit quality, and rendering on Core Image-compatible video cards.
Purchasing the software gets users the not just the Aperture plug-in but the version for Photoshop CS3, and a stand-alone version that drops 16-bit support, but still supports "many" standard RAW formats. Hooks enable it to work as an external editor alongside Lightroom or Aperture. LensFix costs $30, and runs on Mac OS X 10.4 or later.
Fresh-Faced Recruit
Joined: Sep 2001
highly recommended
I use PTMac (a Mac front-end GUI for PanoTools) and LensFix. Awesome stuff and great value.