Proxel Lens Corrector is a groundbreaking utility that corrects your lens aberrations: barrel, pin cushion, fish eye, translation or a combination of all. The advantages of the tool compared to the competition are:

You can correct any lens you own, including e.g. wide angle converters.
You can easily make high-quality measurements yourself, i.e. the result is not based on manual tweaking.
The canvas size is increased for full quality of your pictures, i.e. no down-scaling of the picture. Canvas resizing is very rare for Photoshop plug-ins.
You can measure and correct all parameters – e.g. correct a non-centered and distorted fish eye.
You get both 8 and 16 bit color depth support.