For example, it's not clear how Edgehancer differs from Sharpen Edges unless you give it whirl. Unfortunately there's no trial version. There is a difference though, when you find you want fine control and don't want to mess with a gaggle of procedural masks made with Find Edges and other filters. It is clear that Fixel tools are all 32-bpc, GPU-accelerated, and compatible with both After Effects and Photoshop CS4+.
Below are some descriptions based on the promotional materials, plus a quick demo video below for each filter.
Fixel LightIT is a local color correction plug-in with a novel algorithm that's based on non-linear masking to identify the shadows in the image. LightIT applies an optimized operation for correcting the colors in the shadows regions, without affecting the other tonal ranges.
Fixel Contrastica, which also features a novel algorithm, can enhance and boost local & global contrast. Contrastica enables you to control the contrast all over tonal range (Shadows & Highlights) to reveal hidden details.
Fixel EdgeHancer too uses a novel algorithm, which unlike “classic” sharpeners, emphasizes the edges exclusively instead of increasing the contrast of the surrounding pixels.
Update: Fixel has added another Pixel Bender, Fixel Coloritivity, a 5 way tinting filter.