Kendo UI is described as 'is JQuery-based framework for rich UI, build HTML5 apps that look native on any device, build desktop and mobile applications for any browser' and is an app in the Development category. There are more than 10 alternatives to Kendo UI for a variety of platforms, including Online / Web-based, Windows, Linux, Mac and Self-Hosted solutions. The best alternative is UIkit, which is both free and Open Source. Other great apps like Kendo UI are Semantic UI (Free, Open Source), jQuery UI (Free, Open Source), Webix UI (Paid, Open Source) and DevExtreme (Free Personal, Open Source).
Design and build complex Web Applications directly in Visual Studio using C# or VB.NET and a rich library of components. Keep the browser and the server in live-sync through small differential Ajax/JSON packets over a failsafe WebSocket connection.