Pyjamas contains a stand-alone Python-to-JavaScript compiler, and an Ajax framework and widget set. Using these components, you can write comprehensive applications without writing a single line of JavaScript.

Many people, when first finding out about Google Web Toolkit, wonder "why can't I use Python instead of Java?". pyjamas is designed to make that possible.

Timeplot is a DHTML-based AJAXy widget for plotting time series and overlay time-based events over them (with the same data formats that Timeline supports).