Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Classic Shell - Classic Shell was developed for Windows 8 since that was the first version of the popular operating system to forgo the iconic Start menu.
Listary - Listary is a revolutionary search utility for Windows
Open Shell - Open Shell is a fork of the Classic Shell project for Windows that getting back the classic start...
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
StartIsBack - StartIsBack returns Windows 10 and Windows 8 a real fully featured start menu and start button, behaving exactly like the ones in Windows 7. It's totally awesome and easy solution for your new Windows woes.