Best Rapid Application Development Products in 2025

A multi-platform .NET UI framework.

Key Avalonia features:

Cross-Platform MVVM Support Rich Styling System Open Source

Open Source

Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.

Key Qt features:

Cross-Platform Development Rich Documentation Mature and Stable Comprehensive UI Components

Open Source

Build cross platform desktop apps with web technologies.

Key Electron features:

Cross-Platform Compatibility Web Technologies Rich Ecosystem Auto-Update Mechanism

Open Source

Build Mobile, Desktop and WebAssembly apps with C# and XAML.

Key Uno Platform features:

.NET IDEs Cross-Platform Development Hot Reload Native Performance

Open Source free

Mendix is the fastest and easiest low-code platform used by businesses to create and continuously improve mobile and web apps at scale.

Key Mendix features:

Rapid Development Ease of Use Scalability Integration Capabilities

Open Source

Build Enterprise-Grade Apps Fast.

Key OutSystems features:

Speed of Development Integration Capabilities Scalability Cross-Platform Deployment

Open source Python framework for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps. Installation on WindowsInstallation on Windows. Installation; What are wheels .

Key Kivy features:

Cross-Platform Open Source Rich User Interface Touch Support

Open Source

wxWidgets: Cross-Platform GUI Library.

Key wxWidgets features:

Cross-Platform Native Look and Feel Wide Range of Widgets Extensive Documentation

Open Source

Build custom internal tools in minutes.

Key Retool features:

Speed of Development Integration Capabilities Customizability Collaboration Features

freemium $10.0 / Monthly (Startup)

Embeddable HTML/CSS/script engine.

Key Sciter features:

Lightweight Self-contained Good performance Cross-platform

Open Source

Build beautiful native apps in record time 🚀.

Key Flutter features:

Cross-Platform Development Hot Reload Rich Set of Pre-Built Widgets Performance

Open Source

GTK+ is a multi-platform toolkit for creating graphical user interfaces.

Key GTK features:

Cross-Platform Compatibility Rich Widget Set Open Source Language Bindings

Open Source

Riverbank | Software | PyQt | What is PyQt?

Key PyQt features:

Comprehensive UI library Cross-platform Integration with Qt Designer Powerful event handling