The Codebreaker challenges may include code from the following sources:

• Alpine Linux - license
• Androguard - license
• Android Jetpack - license
• Kotlin Symbol Processing - license
• Material Components for Android Jetpack - license
• Android Studio - license
• Apache Commons Compress - license
• Apache Commons IO - license
• Kotlin - license
• Kotlin Serialization - license
• Logback for Android - license
• loguru - license
• Mattermost - license
• mmpy_bot - license
• Square OkHttp - license
• OpenSSL - license
• OpenWrt - license
• PostgreSQL - license
• The python programming language - license
• Square Retrofit - license
• SLF4J - license
• spice-webdavd - license
• XZ for Java - license
• zlib-ng - license