Mobbin - Latest mobile design patterns & elements library
Fugue - Free and premium stock music for your videos, games, and UI
pttrns - iPhone and iPad user interface patterns
TunePocket - Download 11,000+ royalty free music tracks and sound FX. Buy once, use forever. New music added daily. Save over 50% compared to most popular similar services. Incredible value!
Page Flows - User flow design inspiration for mobile & desktop
UI Sounds - Learn sound design for user interfaces by example 🎵