Gibber is a JavaScript live coding environment with a relatively easy syntax. Gibber works in Chrome and Safari 6 or higher. Gibber is open-source and available for download.
Other projects/code that contribute to Gibber:
Learn more about live coding at Toplap.org
Some live coding environments that were particularly inspiring to this project:
Ctrl-Returnexecutes selected code. If no code is selected current line of the cursor is run.
Ctrl .toggles the audio on and off
Ctrl-Shift-Returnexecutes code at the start of the next measure.
Ctrl-Shift-Alt/Option-Returnselect and execute block of code.
Ctrl +- (Cmd +- on OS X)change font size up and down.