SuperCollider is a state of the art, realtime sound synthesis server as well as an interpreted Object Oriented language which is based on Smalltalk but with C language family syntax. The language functions as a network client to the sound synthesis server.
Live coding is the act of writing software while it is executing, often as part of a performance. Some electronic music bands live-program their music in languages like ChucK and SuperCollider.
These bookmarklets let you see how a web page is coded without digging through the source, debug problems in web pages quickly, and experiment with CSS or JS without editing the actual page.