Free universal database tool and SQL client

Most popular Mocking framework for unit tests written in Java

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Realm is a mobile database: a replacement for SQLite & ORMs

Android library to handle jobs in the background.

(DEPRECATED) Plugins for use with PhoneGap.

Insanely easy way to work with Android Database.

A build environment for the XMPP client library Smack on Android

Kick-starts Android application development.

Open source module for Xposed Framework that hides root from specific apps

A RSS reader library to fetch a RSS feed from the web and parse it to workable objects