The ExtendScript Toolkit (ESTK) 2.0 is a development and debugging tool for JavaScript scripts included with Adobe® CS3 Suites and applications such as Bridge, Photoshop, Illustrator, InDesign, and After Effects. ESTK 2.0 is a new and enhanced version that allows you to create, edit and debug ExtendScript (Adobe's JavaScript language) all with an updated user interface, a new text engine, and the ability to debug more than one script at a time.