Choosy - Choosy opens links in different browsers as specified, according to rules, set by the user.
Pretzel - Keyboard shortcuts for the app you're currently using
Finicky - A MacOS app for creating rules that decide which browser is opened for every link that would open...
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
Account Surfer - Quickly switch between accounts and browsers on Windows
Hotkey Commander - Find out and override what hotkey combination is registered by which application.