AutoHotkey - The ultimate automation scripting language for Windows.
EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.
Pulover’s Macro Creator - Pulover’s Macro Creator is a Free Automation Tool and Script Generator.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
AutoKey - A Python 3 port of AutoKey, the desktop automation utility for Linux and X11.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.