MathJax - MathJax is a cross-browser JavaScript library that displays mathematical notation in web browsers.
wxWidgets - wxWidgets: Cross-Platform GUI Library
AsciiMath - Easy-to-write markup language and JavaScript display engine for mathematics
Electron - Build cross platform desktop apps with web technologies
WordPress themes - Find the perfect theme for your WordPress website. Choose from thousands of stunning designs with a wide variety of features and customization options.
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.