Wayne Robson has released ReDucto, a free, standalone polygon reduction tool. It looks like it might have some other features that could also be useful to scanners.
*Unique Polygon Reduction Algorithm using its own AI that works out how best to reduce the polycount of your mesh created especially for digital sculpts. It gives better results that anything around currently.
*Intelligent hole filling capable of filling 'impossible holes' other apps will reject
*Industrial strength tri stripping and un-stripping
*Bake Ambient Occlussion and Normal map data direct to your mesh at vertex level
*Mesh merging of high polycount datasets
*Find and Fix problems in your mesh such as rougue vertex, non planar faces many many more
*Fave, edge and vertex optimisation to enable faster loading times
*3 types of subdivision not found in most applications
*Customisable interface configurations
*Works with any application it is totally agnostic
He's also released MudWalker, which could be useful depending on the software you use.
Found here - http://psychocore.com/index2.html