"a set of Java libraries that make using Apache ZooKeeper much easier"

a programming language for the cloud and other distributed computing systems

"a highly-available, completely consistent store for small amounts of extremely important data"

"graph database and computation platform over distributed memory cloud"

"The Distributed Graph Database for the Cloud and Beyond"

a library that provides easy cluster management and workload distribution

"a simple, fast workqueue service"

"a simple cluster computing framework built on top of Nexus"

"Simple, high-reliability, distributed software configuration management"

"a general-purpose programming language, with a particular emphasis on mobile and distributed systems. It is loosely based on the Bigraphs formalism, and owes an ideological debt to the Bigraphical Programming Languages project."

"developing the world’s largest distributed computing network"

"a high-performance, schema-free document database designed for cloud computing"

"a technology for describing distributed software systems as collections of cooperating components, and then activating and managing them." Looks very much like Puppet.

"a distributed network file system designed to provide excellent performance, reliability, and scalability"

"a distributed programming language developed specifically for writing programs to be deployed on mobile ad hoc networks"

"Bloom filters, Bloom joins for distributed databases and some novel extensions to them"

"a service for coordinating processes of distributed applications"

"a family of protocols for solving consensus in a network of unreliable processors. Consensus is the process of agreeing on one result among a group of participants."

"a distributed virtual queue-like system"

A very elegant way of performing asynchronous tasks from Rails. Certainly easier than writing a daemon... something to consider for Starling.

Sort of like Twitter's own as-yet-unreleased Starling, but it has its own protocol rather than speaking memcache's.

an open source toolkit that provides a high performance messaging service.

farm out database fixups with little fuss