Glade is described as 'RAD (Rapid Application Development) tool to enable quick & easy development of user interfaces for the GTK+ toolkit' and is an app in the development category. There are more than 10 alternatives to Glade for a variety of platforms, including Linux, Windows, Mac, BSD and GNOME apps. The best Glade alternative is Qt Creator. It's not free, so if you're looking for a free alternative, you could try Cambalache or Anjuta. Other great apps like Glade are GNOME Workbench, Yad, wxFormBuilder and wxDev-C++.
Qt Creator is a cross-platform integrated development environment (IDE) built for the maximum developer experience. Qt Creator runs on Windows, Linux, and macOS desktop operating systems and allows developers to create software across desktop, mobile, and embedded platforms.
Cambalache is a new RAD tool that allow development of user interfaces for Gtk 4 and Gtk 3 toolkit. It was born as a substitute for Glade.
Anjuta is a versatile Integrated Development Environment (IDE) for C and C++ on GNU/Linux. It has been written for GTK/GNOME and features a number of advanced programming facilities including project management, application wizards, an interactive debugger and a powerful source...
Workbench lets you experiment with GNOME technologies, no matter if tinkering for the first time or building and testing a GTK user interface.
Yad (yet another dialog) is a fork of Zenity with many improvements, such as custom buttons, additional dialogs, pop-up menu in notification icon and more. It's useful for creating quick and easy GUIs for shell and batch scripting.
wxWidgets is an excellent framework that enables the creation of multi-platform applications with and without a graphical user interface. There are several applications that help create dialogs visually, even so, some practical problems have led me to start the development of a...
wxDev-C++ is an extension of Bloodshed Dev-C++ by Colin Laplace et. al. This program helps you to create dialogs and frames for wxWidgets visually using a form designer.
wxGlade is a GUI designer written in Python with the popular GUI toolkit wxPython, that helps you create wxWidgets/wxPython user interfaces. At the moment it can generate Python, C++, Perl, Lisp and XRC (wxWidgets' XML resources) code.
Visualwx aims to be the ultimate RAD tool, designed for c++, python, perl, ruby, lua and wxWidgets. Still there are many things to do, but we've achieved considerable progress.
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It's an up-to-date (GTK4/adw) replacement for the now-unmaintained Glade! With 0.12, there's custom widgets, so I see a lot more use! :)