My Electroacoustic Garden for synthesis and transformation of sound. Open source.
Control Ableton Live from your phone or tablet's browser.
Live Remote runs on your computer and serves a Live-like interface to any phone or tablet on the same Wi-Fi. You get Session and Arrangement views, the mixer, transport, and a simplified Record screen with a big REC button and input meters.
It's built for recording yourself when the instrument is far from the computer. There's nothing to install on the phone.
“Press record from the other end of the house.”
Test it. Break it. Fix it. Pull requests welcome.