SwiftDefaultApps - Replacement for RCDefaultApp, written for macOS Sierra, in Swift 3.
Link Shell Extension - Link Shell Extension (LSE) provides for the creation of Hardlinks , Junctions , Volume Mountpoints...
FileMenu Tools - FileMenu Tools lets you customize the context (right-click) menu of Windows Explorer.
Symlinker - Symbolic Link Creator. GUI for mklink, Microsoft Windows symlink utility
RCDefaultApp - RCDefaultApp is a Mac OS X 10.
FileTypesMan - FileTypesMan is an alternative to the File Types tab in the Folder Options of Windows.