jReflectServer
A lightweight Java HTTP server and webservice-framework
jReflectServer is a very small, lightweight and super easy-to-use java web-server and -framework for creating (distributed) pure java web-applications, webservices and small websites. jReflectServer is able to randomly forward requests to a cluster of remote server nodes. For this distributed code execution no special code is needed. A distributed session can be used to share data between the server instances.
Due to its small footprint, it's also perfect for embedded hardware like the raspberry pi. It is based on proven components like apache http components, apache file upload and jsoup.