Contexts - Switch between application windows effortlessly — with Fast Search, a better Command-Tab, a Sidebar or even a quick gesture. Free trial available.
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
VistaSwitcher - VistaSwitcher is an elegant and powerful task management utility for Windows OS.
Listary - Listary is a revolutionary search utility for Windows
Witch - Welcome to the world of W. i. t. c. h.
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.