A friend of mine made one of these years ago, simply because he needed one for his own Ludum Dare game jams. I'm obviously biased but I like the interface a little bit more:
Very thankful for jfxr, I'm using it to create all the sound effects for my game.
I re-implemented his synthesizer in C++ so that the sound effects can be generated at runtime: https://github.com/pewpewlive/ppl-synth
The sound files are just Lua tables that specify the characteristics of the sound effects, like so:
This looks very similar to https://killedbyapixel.github.io/ZzFX/ whose author does lots of tiny Javascript code things (dweets, demos, a tiny game engine recently)
Ah yeah, nice! I used DrPetter's sfxr (and cfxr) for a couple game jams. Very useful for quick sound synthesis, great starting point even to use as extra awesomeness to layer on top of other sounds (like hastily-recorded foley audio) :)
I like how it manages to be a hybrid of a skeuomorphic and flat interface, which are supposed to be polar opposites on the design spectrum. Very beautiful
I use sounds generated by it for the notification sound and the ringing tone (though I edited it out to include a 5 second silence at the end). I thought about creating an app for that to make it easy for everyone to have simple and completely custom sounds good their phone.
https://github.com/grumdrig/jsfxr
I maintain the sfxr.me fork which adds some quality of life improvements, and pro.sfxr.me which brings cloud saving, sound packs, and other features.
Eric is also the creator of Progress Quest, the original idle game!
https://en.m.wikipedia.org/wiki/Progress_Quest