Best Windows Free Open Source Software

A lightweight, non‑Chromium browser built for stability and control

Automate time tracking and stay focused

The fast, private, and independent web browser that puts your security first.

A Swiss Army knife of offline utilities for developers.

A lightweight and secure Bitcoin wallet focused on speed and low resource usage.

Open-source client-server backup software with image and file-level restores

High‑accuracy open‑source OCR engine for developers and researchers

Free, peer-to-peer messaging and calling app with no servers and no personal data required.

Command-line double-entry accounting system

A free, cross-platform advanced subtitle editor built for precise timing and styling.

A free, open-source RAW photo editor and workflow application built for photographers.

An encrypted messenger that runs over standard email servers instead of a proprietary network.

Free, open-source 2D animation software with vector tweening and a bone-based rig system.

Open Source Computer Vision Library

Cross-platform automation framework for all kinds of apps

A free, open-source, cross-platform digital audio workstation for making music.

Free, open‑source video editor for fast, professional editing

Stateless password manager

Mozilla's free, open-source email client with built-in calendar and deep add-on customization.

Open-source frametime capture and analysis tool built on Intel's PresentMon

Peer-to-peer encrypted messenger that works over Bluetooth, Wi-Fi, or Tor, even without internet.

Lightweight, open-source alternative to Armoury Crate for controlling ASUS gaming laptops

Free, distributed, encrypted messaging protocol with no central servers and no ads, ever.

Open-source antivirus engine for detecting malware across platforms