Immutable database and Datalog query engine in ClojureScript
Immutable, reactive Flux architecture. UI Agnostic.
Efficient, Immutable, Thread-Safe Collection classes for Ruby
A robust library to handle immutable big numbers inside PHP applications
T4 template for immutable type generation
super-opinionated, yell-at-you-for-everything, immutable Flux framework
Scala event-sourcing libary
Flux with immutable data and pure action handlers
easily add # -*- immutable: string -*- comments to the top of all your project's .rb files