MochiKit is a light-weight JavaScript library written and maintained by Bob Ippolito. Inspired by the Python networking framework, Twisted, it uses the concept of deferred execution to allow asynchronous behaviour. This has made it useful in the development of interactive web pages which maintain a dialog with the web server, sometimes called Ajax applications. Of particular note is its ability to load and manipulate JSON-encoded data sets, and MochiKit.DOM, a set of functions to easily create dynamic page components.