NOsql Object (NO2 a.k.a Nitrite) database is an open source nosql embedded document store written in Java. It has MongoDB like API. It supports both in-memory and single file based persistent store.
Android Java NoSQL
Potassium Nitrite (KNO2) is a kotlin extension of nitrite database. It aims to streamline the usage of nitrite with kotlin by leveraging its language features like extension function, builders, infix functions etc.
Android Kotlin NoSQL
Nitrite DataGate is the replication server for Nitrite database. It synchronizes nitrite databases across different devices.
An event bus for java 1.6+. It dispatches event to registered listeners. It is a simple but powerful publish-subscribe event system and supports weak references of subscriber.