JetBrains PhpStorm is a commercial, cross-platform IDE for PHP built on JetBrains' IntelliJ IDEA platform. PhpStorm provides an editor for PHP, HTML and JavaScript with on-the-fly code analysis, error prevention and automated refactorings for PHP and JavaScript code. PhpStorm's code completion supports PHP 5.3, 5.4, 5.5 & 5.6, including generators, coroutines, the finally keyword, list in foreach, namespaces, closures, traits and short array syntax. It includes a full-fledged SQL editor with editable query results

HttpUnit makes easy to bypass the browser and access your site from a program. Written in Java, HttpUnit emulates the relevant portions of browser behavior, including form submission, JavaScript, basic http authentication, cookies and automatic page redirection, and allows Java test code to examine returned pages either as text, an XML DOM, or containers of forms, tables, and links.

JavaScript Client and ASP .NET Server Testing Framework
If you are looking for a way to:
* Do Test-Driven Development on in-line ASP .NET code
* Write code using the same language on the web client and the web server
* Write .NET code in a dynamically typed language
* Use a simple testing framework you customize for your team

The project aims to integrate the Google Web Toolkit (GWT) and the Dojo framework.

Schmant provides an environment for running build scripts and a set of tools (tasks) that the scripts can use. Schmant can, and will probably mostly, be used for building Java applications. The immediate goal for Schmant is to be comparable to Apache Ant in features, but nicer and easier to work with. Schmant uses the scripting support in Java 6, so build scripts can be written in any scripting language that has a JSR 223-compatible script engine, such as JavaScript, BeanShell or Jython.

Dojo Toolkit's JavaScript compressor.

AJAX Client Engine (ACE) is a JavaScript component that makes it easy to develop AJAX-style Web applications.

PhoneGap is an open source development tool for building fast, easy mobile apps with JavaScript. If you’re a web developer who wants to build mobile applications in HTML and JavaScript while still taking advantage of the core features in the iPhone, Android and Blackberry SDKs, PhoneGap is for you.

midori is an ultra-lightweight JavaScript framework that gets the job done without getting in your way.

Jasmine is yet another JavaScript testing framework. It's heavily influenced by JSSpec, ScrewUnit & JSpec, which are all influenced by RSpec. But each of those was lacking in some way: JSSpec & ScrewUnit require a DOM. JSpec's DOM-less assumption was a great start, but it needed asynchronous support.