Microsoft Power Automate - Microsoft Power Automate is an automation platform that integrates DPA, RPA, and process mining. It lets you automate your organization at scale using low-code and AI.
Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
Pulover’s Macro Creator - Pulover’s Macro Creator is a Free Automation Tool and Script Generator.
Oni - An IDE powered by Neovim
AutoKey - A Python 3 port of AutoKey, the desktop automation utility for Linux and X11.
GraphWalker - GraphWalker is an open source Model-based testing tool for test automation. It's designed to make it easy to design your tests using graphs.