DxO is giving away copies of its FilmPack 3 Essential edition software. Go here to download it (277Mb for the Windows edition). The manual is here. No 'gotchas' that I can see.

FilmPack 3 runs on its own or with DxO Optics Pro v8.2 or higher; Photoshop CS3, CS4, CS5, CS6 & CC; Photoshop Elements 9, 10 & 11; Lightroom 3, 4 & 5 and Apple Aperture 3. It works with TIFF and JPEG files (in and out).

With it is a discount offer on the next version. Both offers end on 31 October 2013.

There's an example of its use below.

Roger