Ultralight is described as 'D HTML UI kit for use with games and desktop apps. It's essentially a stripped and rebuilt version of WebKit designed for speed, performance and efficiency' and is an app in the development category. There are more than 10 alternatives to Ultralight for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Ultralight alternative is Electron, which is both free and Open Source. Other great apps like Ultralight are Photino, Sciter, Google Cobalt and NoesisGUI.
If you can build a website, you can build a desktop app. Electron is a framework for creating native applications with web technologies like JavaScript, HTML, and CSS. It takes care of the hard parts so you can focus on the core of your application.
Photino is a lightweight open-source framework for building native, cross-platform desktop applications with Web UI technology.
Use HTML and CSS to build cross-platform desktop apps. Sciter provides a stack of GPU-accelerated web technologies for desktop UI development.
It uses less RAM than both Electron and Ultralight, creates only a single process and it's cross-platform.
Cobalt is a lightweight HTML5/CSS/JS application container that is designed to provide a rich application development environment with minimal resource consumption (deployment size, RAM, CPU, GPU). At the same time, Cobalt enables a rich, low-latency user experience across a...
Coherent GT is a user interface runtime for game UI based on a heavily modified version of WebKit. It removes unnecessary features of Webkit and involves rewriting of some elements to get it finely tuned for performance in games.
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electron isn't embedded nor does it run natively and/or on the gpu.