Liemoth

Liemoth (formerly AHDK) is a free and open source software add-on for Ambarella based devices.

Demonstration: https://www.youtube.com/watch?v=8iN3dRujXYc
Support my work: https://petabyt.dev/donate.html

What can it do?

Run Magic Lantern/CHDK like interactive menu loaded onto camera
Real time C/C++ code execution over WiFi
Run Linux shell commands
Games :)
Also, has an Ambsh preprocessor + minimizer and Extensive Ambsh documentation

Goals:

Module system
Motion detection photo (in progress)
Raw photos
Raw video (?)
Porting to other models (A9, A12?)
Reverse engineering sensor functions
New features

Building

Liemoth can be built on Windows and Linux.
Dependencies:

Host GCC/TCC
Arm GCC
Git bash or msys32 (if on Windows)

Head into a directory and type make help.
It should be pretty straightforward.

This is the compiler used by Ambarella (I think). You can also
use it to compile apps that run on the camera's Linux system.
arm-none-linux-gnueabi
It's older (2009), so it will generate assembly around 2x the size of newer GCCs.
Personally, I use gcc-arm-none-eabi-5_4-2016q3, since it's the same compiler that
Magic Lantern uses.

Thanks to

http://spritesmods.com/?art=zx3hack&page=4 for the work done back in 2010
The GoPrawn community https://www.goprawn.com/
The entire hacking/reverse engineering community

Other