I started to use riot-os a few weeks ago now and I'd like to tell you that your project is totally awesome and quite well documented.
I first began to write some sample applications with in mind the idea of providing some easy to use/understand starter tutorials showing the possibilities offered by riot-os (UART, GPIO, NET, etc). I tried to have the examples as much documented as possible (but we all know that this can always be improved). The code is already available on GitHub . By the way I noticed that you already have a repo targeting the same idea .
What do you think of merging both or maybe create another repository called "riot-tutorials" where "aabadie/riot-apps" could be moved ? Are you interested in such a contribution ?
 https://github.com/aabadie/riot-apps  https://github.com/RIOT-OS/applications