Some risky stuff here
Use any of these tools at your own risk. Be careful, especially if your Kobo's internal memory is soldered.
Unfortunately, I'm not a developer, so I have no idea how much of the developer stuff works on a Kobo. However, for those that are interested, check out:
Alternate operating system stuff
- Development environment on Kobo -- a step-by-step guide to creating a development environment on your Kobo
- Xorg for Kobo -- running an alternate operating system on your Kobo capable of running full Internet browsers (ie. Firefox)
- Yocto Linux for Kobo Clara HD
- Android for Kobo Glo/Aura HD/Touch