- ice_nine: Deep freeze ruby objects
- Values: Simple immutable value objects for ruby
- immutable_attributes: specify attributes within an ActiveRecord model that can be set but not modified
- hamster: Efficient, Immutable, Thread-Safe Collection classes for Ruby
- The Value of Values
- Simple Made Easy
- The Database as a Value
- Persistent Data Structures and Managed References
- Boundaries
- Functional Core/Imperative Shell (Subscription required)
Awesome talk. Thanks for sharing.