- The Haversine formula is an equation important in navigation, giving great-circle distances between two points on a sphere from their longitudes and latitudes.
- Udi Cohen: Write your own Android Authenticator
- Android Device Manager – Find, Lock, and Erase your devices remotely.
- Coding Horror: New Programming Jargon – Candidates for new programming from Stack Overflow, I particularly like Yoda Conditions and Egyptian Brackets.
- Google Java Code Style Guide
- Android Open Source Code Style for Contributors
- Program Creek – A site all about Java, including Java Core, Java Tutorials, Java Frameworks, Eclipse RCP, Eclipse JDT, and Java Design Patterns.