I'm an Android user who never learnt to code but has UI design as a hobby. I'm also fond of the GTD productivity method, but never found an Android app that could bring all its potential.
So, I designed one myself, together with a friend who would then do the coding. The problem is, this person didn't had any free time to code and the app was never finished.
I would like to find a developer or group of developers who would like to take on such a project, and make this app real. You can read all about the design, and make your comments and questions, in this Google Docs document.
I hope you find it inspiring.