Best Cross-Platform Development Products in 2025

A multi-platform .NET UI framework.

Key Avalonia features:

Cross-Platform MVVM Support Rich Styling System Open Source

Open Source

As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more.

Key DocRaptor features:

Ease of Use Customizable High-Quality Rendering Compliance

Try for free paid Free Trial $15.0 / Monthly (125+ Documents)

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

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 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

wxWidgets: Cross-Platform GUI Library.

Key wxWidgets features:

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

Open Source

Neutralino is a lightweight application development framework.

Key NeutralinoJS features:

Lightweight Cross-Platform No Dependencies Required Native Feel

Open Source

Embeddable HTML/CSS/script engine.

Key Sciter features:

Lightweight Self-contained Good performance Cross-platform

Open Source

nwjs.

Key NW.js features:

Cross-Platform Node.js Integration Chromium Embedded Full Access to Native APIs

Open Source

Fast Light Toolkit - Fast Light Toolkit (FLTK).

Key FLTK features:

Lightweight Cross-Platform Fast Performance Open Source

Open Source

Affordable online tool for non-technical people to launch their personalized apps within minutes.

freemium $19.0 / Monthly (Starter, 1GB, 50 Users, In-App Notifications, Email Support)

Fast, light HTML UI solution for C++ apps.

Key Ultralight features:

Lightweight Cross-Platform High Performance

Open Source