Ultralight vs Sciter: What are the differences?
Ultralight: A lightweight, pure-GPU, HTML UI renderer for native apps. intended to be used for rendering HTML UI within games and desktop apps. The API is currently available for C++ and supports OpenGL 3.2+, Direct3D 11, and Metal 2; Sciter: An HTML/CSS/scripting engine designed to render modern desktop application UI. It brings a stack of web technologies to desktop UI development. Web designers, and developers, can reuse their experience and expertise in creating modern looking desktop applications.
Ultralight and Sciter can be primarily classified as "Cross-Platform Desktop Development" tools.
Ultralight is an open source tool with 1.15K GitHub stars and 65 GitHub forks. Here's a link to Ultralight's open source repository on GitHub.