I just created PersonalDev: https://gomix.com/#!/project/personaldev
A simple tool for writing down your own personal development goals and checking from time to time how you are improving.
My idea is to create a useful Gomix app that people can remix and use for their own cases.
But I am just learning to code (started last November) and I kind of hustled my way through the code. So I am sure other more experienced developers can help me improve both the code quality and the features/design.
So if you are interested in improving it for others to use, let me know I invite you to join the project and work on it.