Java Client for ClusterWS - lightweight, fast and powerful framework for building scalable WebSockets applications in Node.js.
Vaadin 6, 7, 8 is a Java framework for modern Java web applications.
This project facilitates the integration of Java applications with Apache CloudStack through its API.
JSON API library for Java
Leading REST API framework for Java
A group of templated API test frameworks based upon this series: http://www.mwtestconsultancy.co.uk/category/api-web-service-testing/
Java framework for Cadence Workflow Service
A message queue client framework (Kafka & ActiveMQ & RocketMQ)
AWARE's Android client. This application allows researchers to easily collect sensor/plugin data locally or remotely to an AWARE server instance.