SculptGL is a nice, tiny and useful WebGL application for 3D sculpting. SculptGL features dynamic subdivision, decimation, uniformisation and adaptive sculpting. It can also export your meshes into OBJ files.
I quickly tested SculptGL and imported the OBJ file into GLSL Hacker (the demo is available in Loading_Object_OBJ/demo_sculptgl.xml of the code sample pack). That works fine:
SculptGL links:
Very impressive. Almost feels like Sculptris.
Unfortunately touch control is hard coded for Wacom tablets.
Anything else works on Android.
1 minute scary artwork 😀
http://goo.gl/HQrV5