Nux is an open-source Java toolkit making efficient and powerful XML processing easy. It is geared towards embedded use in high-throughput XML messaging middleware such as large-scale Peer-to-Peer infrastructures, message queues, publish-subscribe and matchmaking systems for Blogs/newsfeeds, text chat, data acquisition and distribution systems, application level routers, firewalls, classifiers, etc.
Passport is authentication middleware for Node.js. Extremely flexible and modular, Passport can be unobtrusively dropped in to any Express-based web application. A comprehensive set of strategies support authentication using a username and password, Facebook, Twitter, and more."
"Knative provides a set of middleware components that are essential to build modern, source-centric, and container-based applications that can run anywhere: on premises, in the cloud, or even in a third-party data center. Knative components are built on Kubernetes and codify the best practices shared by successful real-world Kubernetes-based frameworks. It enables developers to focus just on writing interesting code, without worrying about the "boring but difficult" parts of building, deploying, and managing an application."