CharacterFX is described as 'character animation tool, created for gamers, artists, modellers and hobbyists'. There are more than 25 alternatives to CharacterFX for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is Blender, which is both free and Open Source. Other great apps like CharacterFX are SketchUp (Freemium), MakeHuman (Free, Open Source), Wings 3D (Free, Open Source) and Autodesk Maya (Paid).
SketchUp (formerly Google Sketchup) is a 3D modeling computer program for a wide range of drawing applications such as architectural, interior design, civil and mechanical engineering, film, and video game design—and available in a freeware version, SketchUp Make, and a paid...
MakeHuman is an interactive modelling tool for creating realistic 3D human characters. These models can be exported to several computer graphics and animation platforms including Blender, Unity 3D, Unreal Engine, OpenSim and Second Life.
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.