CodeRun Studio - A free browser-based IDE
CodeRun Studio is a cross-platform Integrated Development Environment (IDE), designed for the cloud. It enables you to easily develop, debug and deploy web applications using your browser.
CodeRun Studio can be used instead or alongside your existing desktop IDE. You can upload existing code in order to test it in the cloud or for sharing with your peers. CodeRun Studio also enables you to instantly compile, package and deploy your code to the CodeRun Cloud.
Feature
CodeRun features native support for C#/.NET (3.5), PHP (5.1), JavaScript, HTML and CSS. C# support includes ASP.NET, WCF, Silverlight and WPF browser application development and deployment. Database support includes SQL Server 2005 and Amazon SimpleDB.
Demo: http://www.coderun.com/ide/
License: License Free