DxO FilmPack 3 Essential edition is free until October 31 courtesy of a Sony promotion.http://www.dxo.com/intl/sony
DxO FilmPack emulates major films from Kodak, Fuji, etc. So if you've been missing that TriX 400 look, this film pack may be worth trying out.
DxO FilmPack is available for Windows and Mac, and works as a plugin for Aperture, Lightroom or Photoshop.
The newer DxO FilmPack 4 is also available at a discount from the same link.