Updated 15 July to add:
Info about testnet 17.
The getting started API pages on the Safedev forum and videos by @hunterlester .
Links to the Maidesafe Asia forum, Twitter and Telegram.
Links to the French version and the Metaquestions blog.
I have removed the link to the mock routing pack because (a) there is currently a live network (although admittedly not for everyone), and (b) it could get confusing as the older apps won’t work with the new API and authenticator. Let me know if you think I should reinstate it. As usual, if there are any mistakes or if I have missed something vital in this update give me a nudge.