ND3D is a simple to use AS3 3D Engine. Aimed for speed and simplicity. Target use are small 3D effects and rapid 3D testing / prototyping. The compiled size of the engine is about 10k.

Features:

• Interactive/clickable meshes
• Wireframe rendering
• Bitmap textures
• Basic dynamic lighting
• Additive blending for materials
• Distance blur for meshes
• 3D sprites
• 3DS, ASE and MD2 mesh loader
• Animated MD2 Meshes
• Pixel & Linerenderer
• Custom renderer
• Apply flashfilters to meshes
• Built in primitives (plane, cube, sphere, box, line3d, sprite3d)
• Vertexcleaner, Normalsflipper

Examples: http://www.nulldesign.de/nd3d-as3-3d-engine/