AudioMass is a free, open source, web-based Audio and Waveform Editor.
It runs entirely in the browser with no backend and no plugins required!

myNoise creates beautiful noises to mask the noises you don’t want to hear : your chatty colleagues, tinnitus, or even your inner voice when you can't shut it down! The concept is simple, works extremely well, and does not require expensive noise-cancelling headphones. Thanks to its unique audio engineering, myNoise sets the standard among background sounds.