Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Time Buddy - Time Buddy brings a colorful world clock.
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.
Time Zones Converter - Time Zones Converter is an application which as the name implies, is used for converting time zones.
Listary - Listary is a revolutionary search utility for Windows
World Clock - World Clock is an app that lets you see the time of any city in the world.