Best Windows Free Open Source Software

A free, open-source quick launcher and search bar for Windows, triggered with a hotkey.

An open-source AI pair programmer for your terminal, compatible with Claude, GPT, and local LLMs.

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

Run agents in parallel, schedule repeat work, preview apps in the built-in browser, and manage prompts, skills, and MCP tools from one place.

Advanced offline password cracker supporting hundreds of hash types

Genealogical research and family tree management

Command-line double-entry accounting system

Secure, fast file transfers from the command line

Digital Forensics and Incident Response