Rainmeter displays customizable skins, like memory and battery power, RSS feeds and weather forecasts, right on desktop. Developed by Rainys
License: Open Source
GeekTool is a macOS application focused on simplicity and integration with macOS, offering a lightweight way to display information on the desktop. In contrast, Rainmeter is a more complex and feature-rich tool for Windows users, providing extensive customization options and a large community for support.