azula is described as 'lightweight alternative to Electron. It is based on Ultralight, which embedding friendly Fork of WebKit, with less memory usage and low disk space requirements' and is an app in the Development category. There are more than 10 alternatives to azula for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is Qt, which is both free and Open Source. Other great apps like azula are Electron (Free, Open Source), GTK+ (Free, Open Source), React Native (Free, Open Source) and NeutralinoJS (Free, Open Source).
Qt is a cross-platform application framework that is widely used for developing application software that can be run on various software and hardware platforms with little or no change in the underlying codebase, while having the power and speed of native applications.
GTK+ is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off tools to complete application suites.
wxWidgets is a C++ library that lets developers create applications for Windows, OS X, Linux and UNIX on 32-bit and 64-bit architectures as well as several mobile platforms including Windows Mobile, iPhone SDK and embedded GTK+.
Ultimate++, also called U++, is a C++ cross-platform rapid application development framework focused on programmers productivity. It includes a set of libraries (GUI, SQL, etc..), and an integrated development environment.
Avalonia is a WPF-inspired cross-platform XAML-based UI framework providing a flexible styling system and supporting a wide range of OSs: Windows (.NET Framework, .NET Core), Linux (GTK), MacOS, Android and iOS.