streamsupport-cfuture is a backport of the Java 8 CompletableFuture API with the current Java 9 (JEP 266) enhancements for Java 6 to 8 and Android developers

web3j is a lightweight Java library for integration with Ethereum clients

Ethereum Application Binary Interface (ABI) for working with smart contracts

Android and General Java client for Centrifugo server and Centrifuge library

Hedera™ Hashgraph SDK for Java

Stream Feeds Java Client for backend and android integrations

StompProtocolAndroid

Websockets on Android

Android client library for integrating with Upollo, a service to help turn repeat signups and account sharers into paying customers, while keeping bad actors out.

facee-sdk

facee-sdk