This project hosts code and tests for enabling Microsoft Excel to publish and subscribe to topics (aka groups in spread) using the spread toolkit.

The spread toolkit is a group messaging platform from Johns Hopkins with the home page http://www.spread.org. Quoting from that site:

"Spread is an open source toolkit that provides a high performance messaging service that is resilient to faults across local and wide area networks. Spread functions as a unified message bus for distributed applications, and provides highly tuned application-level multicast, group communication, and point to point support. Spread services range from reliable messaging to fully ordered messages with delivery guarantees."