Any other web-based instrument UIs?

[1j01]

Post any musical UIs here that you think would be cool to be integrated :)
If it's just a synth, post it here instead.

Keep in mind we don't need ten different piano UIs*, but other than that it's fair game.

*Or maybe I should say ten different piano keyboard GUIs, because what if

1. one was a normal skeuomorphic piano keyboard
2. one was "getting MIDI data from an electric piano"
3. one used audio/visual data from a recording of a piano to generate MIDI data
4. maybe one was similar but realtime (maybe not as accurate)
5. one was a tactile augmented reality piano (or at least 3D haha)

well, that's half way to ten

P.S. we do need one ;)

[1j01]

Hexagons (MIT License)
would be a good MIDI device. I would add scale highlighting alongside the layout configuration.

The Infinite Drum Machine (Apache License 2.0)
Their "musical interface" for it is a drum roll, but I think it's much more interesting to swipe around through the sound space, and I would use recordings of that as samples. If it was integrated though, maybe it could generate timed playback of the samples into a track (which would at least offer "compression" (of the document in storage), but if exposed (in Wavey's UI), could lead to more musical possibilities and more powerful operations like slowing down tempo at which the sounds are actuated (maybe over time with automation), or the playback rate of the sounds, indepently; thinning out the sounds for a section of music; etc.)

Pink Trombone (MIT License, secretly*)
"The QWOP of speech" seems pretty apt, haha. I'd be interested in automating it, and using it to produce maybe some perfectly mathematical speech patterns or whatever, but also, it'd be good if you're shy or otherwise want to be anonymous, or if it's late at night, or if you have a speech disorder, to have an option like text to speech but more expressive.
It'd be cool if you could initialize it with automation from a text to speech engine, but then tweak it.
I'd also like to be able to use the GUI on my phone for multitouch, interfacing with the DAW on desktop.
*It's MIT licensed, if you look at the source of the page. I don't see an official public repo, but someone's created a repo for it here.

Guitar (MIT license)
(ignoring the tablature part, at least for starters. but using it to play tablature could be included later)
Has scale highlighting.

Tri-Chromatic Keyboard (MIT license)
Has scale highlighting. (This is where I first implemented it.)