Orbot license is available under a 3-clause BSD style license:
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Gibberbot is now set to Apache 2.0. As it was based on the original
Android OS chat app, which is Apache Licensed, we have elected to keep
it that way.
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SQLCipher for Android: This project contains code that was released in the Android OS under the Apache license, and we have elected to keep it that way for our release.
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Secure Smart Cam (Obscura): Licensed under GPL v3
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LUKS Encryption: Licensed under GPL v3
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