pywebview is described as 'lightweight cross-platform wrapper around a webview component that allows to display HTML content in its own native GUI window. You may think of as Electron for Python (minus huge executable sizes)' and is an app in the Development category. There are more than 10 alternatives to pywebview for Windows, Mac, Linux, Chrome OS and BSD. The best alternative is Qt, which is both free and Open Source. Other great apps like pywebview are Electron (Free, Open Source), GTK+ (Free, Open Source), NW.js (Free, Open Source) and Sciter (Freemium).
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.
Tauri is a toolkit that helps developers make applications for the major desktop platforms - using virtually any frontend framework in existence. The core is built with Rust and the CLI leverages Node.
A framework for creating desktop apps for Windows, Mac and Linux. Based on Qt and Python, it is a lightweight alternative to Electron. Unlike other solutions, fbs makes packaging easy: Create an installer for your app in seconds and start distributing it to your users.