There are many ways to contribute to Epidermis' development:
Translating is easy, just create a Launchpad account and head over to translations.launchpad.net/epidermis, translation is open to anyone so you can start right away!
Just like most free software projects, Epidermis has a bug tracker so that problems can be identified quickly and properly addressed.
If you think you can make the graphical user interface more intuitive and know how to improve a program's usability, Epidermis could use your suggestions. Here are some of the ideas for a GUI, send yours in!
Put your hacker's hat on and start coding. If you know Python and PyGTK, you're perfect for the job. Just grab the Epidermis bzr branch off launchpad and upload it as your own personnel branch, no commit permissions required. Once your branch is ready, request a merge. If you don't know where to start, mentoring is available.
If you're desperate to put your cash to good use and donate to Epidermis, may we redirect you to Stani's Python Editor instead? Epidermis' main developer (actually, only developer at this point) uses it a lot, so helping SPE would be helping Epidermis.
See you soon!