Astah, formerly known as JUDE (Java and UML Developers' Environment, pronounced Jūdo (ジュード)), is a UML modeling tool created by Japanese company Change Vision. JUDE received the "Software Product Of The Year 2006" prize, established by Information-Technology Promotion Agency in Japan.
The Community edition (formerly known as Take (竹, "Bamboo") edition for prior to version 1.4) is free to use and offers the following functionality:
JUDE/Professional is the product version of JUDE with all the features of JUDE/Community plus enhancements. It has features such as input-output and diagram creation guidance. It is suitable for business use, large-sized models, and document creation. A 20-day free trial is available by obtaining an Evaluation License.