UX Challenges - Done reading about UX? Start doing it.
Detour - Immersive audio walks, now in 17 cities
Uxcel - The easiest way to learn UX/UI design
NoisyLoop - Play urban soundscapes in a loop
uxtoast: Learn UX Design - Become familiar with design laws and learn how to use them.
Alpe Audio - Audio courses to master new topics 'on the go'