SculptGL is described as 'browser-based 3d-modeling application' and is an website in the Photos & Graphics category. There are more than 25 alternatives to SculptGL, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux, iPad and Android. The best alternative is Blender, which is both free and Open Source. Other great sites and apps similar to SculptGL are Wings 3D (Free, Open Source), ZBrush (Paid), Cinema 4D (Paid) and Bforartists (Free, Open Source).
Wings 3D is a subdivision modeler inspired by Nendo and Mirai from Izware. It is possible to assign materials, vertex color, UV coordinates and textures, but there will be improvements in those features before Wings goes 1.0.
Rocket 3F is polygonal modeller created for Concept Artists and Designers. Modeling with Rocket 3F is like drawing - very Simple and Inspiring! The Most important feature of Rocket 3F is Workflow! It is Fast Fun and Friendly!
Neobarok is a 3D modeling software aimed at artists and users of all levels. It allows you to quickly give shape to your artistic, design, or engineering ideas, to create highly complex objects using a relatively simple toolkit.