Loopy Pro - Loopy, the sophisticated, tactile live looper app that reinvents iPhone and iPad music making.
UI Garage - Specific mobile and web design patterns for your inspiration
Group the Loop - Live Looping with usefull GUI, Verse/Chorus layer system, drummer, effects, etc...
Muzli - UI/UX and Design Inspiration Chrome Extension
Repetito - Repetito: the multichannel looper software for live performance on the PC.
Design Hunt - Curated design inspiration for everyone