Commercial Software License
This is the appropriate option if you want to use Sencha GXT to develop commercial applications whose source code you want to keep proprietary.
Commercial OEM License
This is the appropriate option if you want to use Sencha GXT to create your own commercially licensed SDK or web application builder. Since use cases vary widely, Commercial OEM licenses are customized for each customer.
Open Source License
This is the appropriate option if you are creating an open source application with a license compatible with the GNU GPL license v3. Although the GPLv3 has many terms, the most important is that you must provide the source code of your application to your users so they can be free to modify your application for their own needs.
If you would like to use the GPLv3 version of Sencha GXT with your non-GPLv3 open source project, the following FLOSS (Free, Libre and Open Source) exceptions are available: