Someone was asking about the GBA Software Renderer, so here I present it to you in all it's glory:

Flat shaded icosahedron rendered at about 18fps

It's nothing much yet, but it supports clipping and backface culling. The thing that I need to look at next is the matrix math, it seems awfully slow.

For those wanting to see it in action, download a copy of the .gba file plus the emulator from here