Best GUI Frameworks in 2025

A GUI builder for Python GUI frameworks.

Open Source freemium $29.0 / One-off

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Key Flagsmith features:

Feature Flags Remote Config A/B/X Testing & Optimization Organization Management

Try for free Open Source freemium

Gio is an open source library for creating portable, immediate mode GUI programs for Android, iOS, Linux, Windows, macOS.

Key Gio UI features:

Cross-Platform Compatibility Immediate Mode GUI Performance Go Language Integration

Open Source

The Fyne toolkit is an easy to learn, free and open source, platform for building graphical applications for desktop, mobile and beyond.

Key Fyne features:

Cross-Platform Support Go Language Customizable Widgets Theming and Styling

Open Source

Qt Creator is a cross-platform C++, JavaScript and QML integrated development environment. It is the fastest, easiest and most fun experience a C++ developer could wish for. .

Key Qt Creator features:

Cross-Platform Development Integrated Development Environment (IDE) Rich Library of Widgets Strong Community and Documentation

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

Postgres.js - The Fastest full featured PostgreSQL client for Node.js - porsager/postgres.

Key Postgres.js features:

Performance Lightweight Asynchronous Support for PostgreSQL Features

Tkinter is a Python wrapper for Tcl/Tk that offers classes to create various graphical user interfaces.

Key Tkinter features:

Built-in Standard Library Ease of Use Cross-Platform Compatibility Strong Community Support

Build full web applications using just SQL queries.

Key SQLPage - Build SQL-only websites features:

SQL Execution Data Visualization Forms

Open Source freemium

Electric UI equips engineers, researchers, and enthusiasts with software to build cross-platform user interfaces for realtime hardware visualisation and control.

Key Electric UI features:

GPU accelerated charting 3D Integration Transformer Pipelines Hot reloading

paid $80.0 / Annually (For passion projects. Non-commercial licence.)

Arduino IoT offers a cloud platform to build IoT devices.

Key Arduino IoT features:

Ease of Use Large Community Versatility Integration with Arduino Ecosystem

Simple REST APIs for Java and Kotlin.

Key Javalin features:

Lightweight Simplicity Kotlin & Java Support WebSocket Support

Open Source

Tkinter Designer was created to speed up the GUI development process in Python.

Key Tkinter Designer features:

Ease of Use Time Efficiency Design Fidelity Automated Code Generation

Adafruit IO is the easiest way to get your projects onto the Internet of Things!

Key Adafruit IO features:

Ease of Use Integration with Adafruit Products Documentation and Community Support Free Tier Availability

Open Source