The linux-sunxi community is the Open Source community that gathered around the Allwinner SoCs. It sees only very limited support from Allwinner itself (usually, and only since recently, some code drops and some documentation). Very few people in this community make a living from working on this hardware, and thus most are volunteers spending their free time and their own money. There are however a few companies which actively contribute to our community, and their hardware is the best supported.
The best way to contribute is to install linux-sunxi software on your own hardware, and to work through our countless howtos and tutorials to get your hardware supported as you want it. You will undoubtedly run into things which are either wrong, not completely documented or broken. By subsequently improving our wiki and our software you will not only help linux-sunxi and countless linux-sunxi users, you will also be helping yourself.
Bring up your own hardware
Help with documentation
For this you obviously need to get a wiki account first. The Wiki category lists all sorts of pages related to our sunxi wiki, some of which are guides on how to improve our wiki, some of which are categories labeling pages which need improvement.
Help with packaging
Help with development
This category has the following 3 subcategories, out of 3 total.