Logstash - transport and process your logs, events, or other data

AWS Service registry for resilient mid-tier load balancing and failover.

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

Access other storage backends via the S3 API

Real Time communication library using Animated Gifs as a transport™

SSE Stream Aggregator

Asynchronous retrying for Java 7/8

Introduce failures into HTTP requests via a proxy server

A ZooKeeper backup tool.