Best Windows Open Source Software

Open-source password manager with a generous free tier.

Privacy-focused VPN from the makers of Proton Mail.

The world’s most popular open-source relational database.

Private, end-to-end encrypted messaging.

Free, open-source image editor.

The advanced open-source relational database.

General purpose TLS and crypto library

Cross-platform automation framework for all kinds of apps

Self‑hosted, Subsonic‑compatible music streaming server for audiophiles

A full-featured download manager

Open source home automation with local control and privacy

Cross-platform password manager compatible with Keepass 2.x

An open platform for various uses

Empowering everyone to build reliable and efficient software

Open-source mod manager with profile switching for Thunderstore-supported Unity games

Open-source automation server for continuous integration and delivery

Bidirectional file sync for Windows, macOS and Linux

Open source classroom client

High-performance web server and reverse proxy

Sync and manage files across cloud storage from the command line

Open-source antivirus engine for detecting malware across platforms

Widely used open-source penetration testing framework for finding and exploiting vulnerabilities.

A powerful, extensible IDE for Java and beyond

Free and open-source vector graphics editor