APIMAN - Open Source API Management

The apiman project brings an open source development methodology to API Management, coupling a rich API design & configuration layer with a blazingly fast runtime. It helps to govern your API. It is flexible, policy-based runtime governance for your APIs. Offer the same API through multiple plans, allowing different levels of service to different API consumers.

It provides rich management layer (REST API and separate UI) to manage/configure not only APIs but also the client applications that consume them. The runtime engine's API is fully asynchronous and is designed to run equally well in both a standard Java EE environment and newer async runtimes like Vert.x.