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Eclipse users: GWT 1.7.1 can be automatically installed as part of the Google Plugin for Eclipse, so you aren't required to download it separately here.
As of version 1.3, Google Web Toolkit is licensed under the Apache 2.0 open source license, which includes limitations of liability and disclaimers of warranty for the product. Please note that some included libraries may be licensed under other open source licenses listed here.
If you want to build GWT from source code, check out our build instructions. If you want to help contribute to GWT, check out Making GWT Better. For SHA1/MD5 sums and downloads for other platforms (Windows, Mac OS X, Linux), see our complete download list.
Once you have downloaded the right package for your operating system, see the Getting Started Guide for detailed installation instructions.