Simple Node.js Javascript
Lightweight Python Minimal
Browsable api Easy to use Great documentation
Lightweight Simple Open source
Makes me Hapi making REST APIs Simpler than other REST libraries Configuration
Async/Await JavaScript
Microframework API Open source
API Microframework MVC
Easy to use Highly customizable Lightweight
Open source Well documented Can be used to apply good security to the whole API
Datastore Agnostic Flexible Plugins Easy Rest
Lightweight Great for quick decoupled apps Simply the best
Python Minimal Really Light Weight
Good in Django Fast development Customizable
C# .Net Middlewares
Easy to use Open source Middleware
Easy setup and usage ES2015 Extensible
Simple Fast Elegant
Fast Lightweight Same API code for many transports (HTTP, Socket, etc)
Simple and super fast