Ecosyste.ms: Packages
An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.
bower.io "a/b" keyword
muton v0.6.2
A feature toggling/throttling and multivariate testing tool10 versions - Latest release: almost 6 years ago - 1 dependent repositories - 15 stars on GitHub
sabot 1.3.6
Simple A/B testing, purely frontend with reporting to any backend.17 versions - Latest release: about 8 years ago - 2 stars on GitHub