These Maya plug-ins are provided free under the GPL licence as open source software. Feel free to use them however you please.

polyShrinkWrap (Custom MEL Command)-

polyShrinkWrap_v10_Maya2008_XP32.zip
This is a modeling tool (docs included) designed to make your polygon objects behave like a plastic shrink wrap. Shrink wrapping is a great tool for resurfacing in Maya. I've found it works best with the Maya 'live' snap tool and the Create Polygon tool. This way, you can draw large patches, split them and shrink wrap to the target mesh while you go; give it a try.

1.Select some vertices, shift select any number of polygon objects to wrap around.

2.Load the plugin and execute polyShrinkWrap MEL command (you can create a hotkey for this).

3.The selected vertices will be 'sucked' (or pushed) along their normals until they collide with a selected mesh.

krWetMap (MEL Command) -
To be released as soon as I get a free moment.