Coolite is a suite of professional ASP.NET AJAX Web Controls which includes the Sencha ExtJS JavaScript Framework.

The suite of web controls are built with a focus on bringing Visual Studio Design-Time support to the Ext JavaScript Framework. A combination of server-side

Server-side

Server-side refers to operations that are performed by the server in a client–server relationship in computer networking.Typically, a server is a software program, such as a web server, that runs on a remote server, reachable from a user's local computer or workstation...

 and client-side

Client-side

Client-side refers to operations that are performed by the client in a client–server relationship in a computer network.Typically, a client is a computer application, such as a web browser, that runs on a user's local computer or workstation and connects to a server as necessary...

 frameworks.

The suite of controls include the following: Integration of the Ext JavaScript Framework. Design-Time support in Microsoft Visual Studio

Microsoft Visual Studio

Microsoft Visual Studio is an integrated development environment from Microsoft. It is used to develop console and graphical user interface applications along with Windows Forms applications, web sites, web applications, and web services in both native code together with managed code for all...

 and Visual Web Developer. Dual Licensed (Open Source

Open source

The term open source describes practices in production and development that promote access to the end product's source materials. Some consider open source a philosophy, others consider it a pragmatic methodology...

AGPL3 License and Professional License).

In November, 2010 Coolite was renamed to Ext.NET.