How to: Feature Flippers and A/B Testing
* [Motorhead](https://github.com/amatsuda/motorhead) - A Rails Engine framework that helps safe and rapid feature prototyping.
* [flipper](https://github.com/jnunemaker/flipper) - Feature flipping for ANYTHING. Make turning features on/off so easy that everyone does it. Whatever your data store, throughput, or experience.
* [Rollout](https://github.com/FetLife/rollout) - Feature flippers.
* [Split](https://github.com/splitrb/split) - Rack Based AB testing framework.
* [Unleash](https://github.com/Unleash/unleash-client-ruby) - Ruby client for Unleash, a powerful feature toggle system that gives you a great overview over all feature toggles across all your applications and services.
* [Vanity](https://github.com/assaf/vanity) - an A/B testing framework for Rails that is datastore agnostic.