4.0 will likely be the last major release. Use Redux instead. It's really great.
I know churn can be frustrating but I feel it would be irresponsible for me to continue recommending Flummox when Redux exists and is a significant improvement over classical Flux. Flummox 4.0 will likely be the last major release.
Idiomatic, modular, testable, isomorphic Flux. No singletons required.
$ npm install --save flummox
Join the #flummox channel of the Reactiflux Slack community.
The documentation is hosted at acdlite.github.io/flummox. It is a pre-rendered, isomorphic app built with Flummox and React. Checkout the source.