AutoHotkey - The ultimate automation scripting language for Windows.
UI.Vision - Modern open-source task and test automation tool and Selenium IDE.
Pulover’s Macro Creator - Pulover’s Macro Creator is a Free Automation Tool and Script Generator.
ZennoPoster - Automation for SEO Experts and other online based activity.
AutoKey - A Python 3 port of AutoKey, the desktop automation utility for Linux and X11.
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.