
Description: Xcompmgr is a lightweight X11 compositor that enables basic compositing effects for window managers that do not provide compositing. It allows for transparency and drop shadows, as well as redirection of application windows.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Picom is a lightweight compositor for X11 window managers. It provides effects like shadows, transparency, and animations to improve the user experience. As a compositor, picom draws windows and handles visual effects separately from the window manager.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API