AutoHotkey
Free open-source scripting and automation for Windows.
free offline open source
Get it →Offline & One-Time Utilities Apps
Czkawka
Open-source tool to find duplicate files, empty folders and junk.
free offline open source
Get it →Espanso
Cross-platform open-source text expander that works offline.
free offline open source
Get it → Setup & migration guide → Free · pay what you want