Windows 10 and 11 have a functional but sterile design characterized by flat icons and a muted color palette. Seelen UI is a free tool that allows users to customize their Windows desktop experience, offering features like adjustable menus, widgets, and a Tiling Windows Manager for better multitasking. It includes an integrated media module and an app launcher inspired by Rofi. Users can easily modify themes, taskbar layouts, and icons. Seelen UI requires the WebView runtime and Microsoft Edge for optimal functionality, with installation options including the Microsoft Store, Winget, and a .msix installer. The recent update to version 2.0.9 introduced enhancements such as XboxGameBarWidgets.exe, refactoring of themes, and fixes for window manager issues and resolution changes. Additional information and download options are available on their GitHub page.