None of those are originally made by me. They are ports to the OpenPandora handheld. Please see the README/AUTHORS files in the packages for more information.
You should be able to build all of them in Sebt3's toolchain.

Emulators:

AdvanceMame 0.106.1 for Pandora with some sourcetweaks to make it run on Pandora and use Notaz accelerated sdllib.
Download

AdvanceMenu 2.5.0 for Pandora with some sourcetweaks to make it run on Pandora and use Notaz accelerated sdllib.
Download

Daphne 1.0 for Pandora with a modified makefile to use the gp2x version of the videodecoder and some more changes to get it to compile in the toolchain.
Download

Games:

The Goonies Remake. My first OpenGL -> OpenGL|ES conversion. Still needs better memoryhandling, as it runs out on Pandora really quick. Also stutters a bit in scenes with water in them. May be better on 512MB RAM Pandoras though.
Download

rRootage - Another OpenGL -> OpenGL|ES conversion. Has some slowdown when a lot of bullets are on the screen. Eager to hear how it runs on a 1GHz Pandora.
Download Source

DragonMemory Download Source

Bubbletrain Download Source

Excellent Bifurcation Download Source

Construo Download Source

ATris Download Source

White Butterfly Download Source