librosa : librosa is a python package for music and audio analysis. It provides the building blocks necessary to create music information retrieval systems.
sfxr : A tool to quickly generate 8bit/16 bit-soud effects!
regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
Audio Shop : Your friendly neighborhood script for mangling images or video using audio editing tools.
COLOURlovers : COLOURlovers is a creative community where people from around the world create
and share colors, palettes and patterns, discuss the latest trends and ...
VST Plugins Free - Virtual instruments and effects