FreeWRL is an Open Source, cross platform VRML2 and X3D compliant browser, with script, SAI and EAI support. Platforms supported: Linux and other Unix-style platforms; Mac OS/X; Windows. Support for mobile platforms (iOS, Android, QNX) is under development.
Android[tm] SDK development is for those who have a dream mobile device in mind and have the potential to contribute to the development of the same at various levels. http://www.openhandsetalliance.com is promoted by Google & other industry giants.