Usable, idiomatic common monads in Ruby
Explain explains your Ruby code in natural language.
Make your Ruby objects versionable
Algebraic Data Types for Ruby
Fuby is a hybrid functional/object-oriented programming language on the Rubinius VM
Mutant is a mutation tester. It modifies your code and runs your tests to make sure they fail. The idea is that if code can be changed and your tests don't notice, either that code isn't being cove…