Free and Open Source, Distributed, RESTful Search Engine

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

Apache Druid: a high performance real-time analytics database.

An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.

Android filters based on OpenGL (idea from GPUImage for iOS)

Asynchronous socket, http(s) (client+server) and websocket library for android. Based on nio, not threads.

Use SQL to query Elasticsearch

Distributed Graph Database

A scalable, distributed Time Series Database.

A VT-100 terminal emulator for the Android OS

Scheduler (HTTP API and webapp) for running Mesos tasks—long running processes, one-off tasks, and scheduled jobs. #hubspot-open-source

Apache Aurora - A Mesos framework for long-running services, cron jobs, and ad-hoc jobs

A distributed system designed to ingest and process time series data

Portably control DNS clouds using java or bash

Interactive command line JMX client

A cache-coherent in-memory data grid

[Deprecated] Sexy way to execute async/background tasks on Android

Compare eventual consistency of object stores

Elasticsearch plugin for reindexing

Java Gearman client and Netty-based server with multi-backend support (currently memory, Redis and PostgreSQL). More features coming including clustering support

Modern Dependency Management

The official Java library for http://airbrake.io

Elasticsearch discovery with SRV records

Lovely Systems Hive Goodies

Galaxy core repository

Archive Kafka topics to S3, with Zookeeper support