Note: each catkin package is usually a repository of many gradle sub projects.
Below you can find other packages in the rosjava-android ecosystem that are not officially supported but are well tested and used by the community. Catkin-Gradle packages utilise the rosjava build tools and standalone projects simply access the rosjava maven repository directly.
Turtlebot Android : simple apps for turtlebot development.
Base Controller : Android controllers for the Kobuki and the Husky robots.