Selenium provides support for the automation of web browsers. It provides extensions to emulate user interaction with browsers, a distribution server for scaling browser allocation, and the infrastructure for implementations of the W3C WebDriver specification.

Automated driver management and other helper features for Selenium WebDriver in Java

Atlassian WebDriver Core

Selenide = concise API for Selenium WebDriver

Vaadin TestBench

Serenity Core

Vaadin TestBench shared classes not dependant on any concrete testing framework.

LittleProxy is a high performance HTTP proxy written in Java and using the Netty networking framework.

Tools for using aXe for web accessibility testing with JUnit and Selenium.

Fixtures to assist in testing via FitNesse

Ant Media Server supports RTMP, RTSP, MP4, HLS, WebRTC, Adaptive Streaming, etc.