librosa : librosa is a python package for music and audio analysis. It provides the building blocks necessary to create music information retrieval systems.
Wavacity : A free and open source audio editor for the web derived from Audacity
Freesound : Freesound is a collaborative database of Creative Commons Licensed sounds. Browse, download and share sounds.
Genericons : Genericons are vector icons embedded in a webfont designed to be clean and simple keeping with a generic aesthetic.
Use genericons for instant HiDPI, ...