CARPE, or Computational and Algorithmic Representation and Processing of Eye-movements, allows one to begin visualizing eye-movement data in a number of ways. It currently supports low-level feature visualizations, clustering of eye-movements, model selection, heat-map visualizations, blending, contour visualizations, peek-through visualizations, movie output, binocular data input, and more. Have a look at one of our video montages which uses a variety of different visualization options all freely available and part of CARPE. The videos themselves are even outputted through CARPE!
Requirements: Windows XP or Higher; At least 1 GB RAM; 2.4 GHz+; Libraries: openFrameworks, Intel OpenCV, Quicktime, Visual Studio 2005, 2008, and Service Packs Runtimes