Ocelot

Ocleot is an API Gateway aimed at people using .NET running a micro services / service orientated architecture that need a unified point of entry into their system. Ocelot is fast, scaleable and provides authentication, routing, request aggregation among many other features.

Pushy

Pushy is an open source Wordpress plugin that pushes data out of wordpress in the form of events. This enables using Wordpress as a headless CMS. That is rather than user requests for content hitting Wordpress for rendering etc you can create your own UI using whatever technology you want.