Disque vs Gearman: What are the differences?

What is Disque? In-memory, distributed job queue. Disque is an ongoing experiment to build a distributed, in-memory, message broker. Its goal is to capture the essence of the "Redis as a jobs queue" use case, which is usually implemented using blocking list operations, and move it into an ad-hoc, self-contained, scalable, and fault tolerant design, with simple to understand properties and guarantees, but still resembling Redis in terms of simplicity, performance, and implementation as a C non-blocking networked server.

What is Gearman? A generic application framework to farm out work to other machines or processes. Gearman allows you to do work in parallel, to load balance processing, and to call functions between languages. It can be used in a variety of applications, from high-availability web sites to the transport of database replication events.

Disque and Gearman can be categorized as "Message Queue" tools.

Disque is an open source tool with 7.37K GitHub stars and 516 GitHub forks. Here's a link to Disque's open source repository on GitHub.