Cairo Shell - Cairo is a desktop environment for Windows.
SharpEnviro - SharpEnviro (or SharpE) is an open source shell replacement system for Microsoft Windows XP...
bbLean - Alternative Windows shell
Open Shell - Open Shell is a fork of the Classic Shell project for Windows that getting back the classic start...
BB4Win - BB4Win (Blackbox for Windows) is an alternative shell for Microsoft Windows.
Immersive Explorer - Browse Folders, Libraries, Favorites etc.