Choosy - Choosy opens links in different browsers as specified, according to rules, set by the user.
Finicky - A MacOS app for creating rules that decide which browser is opened for every link that would open...
Browser Select - Browser Select is a utility to dynamically select the browser you want instead of just having one...
Switchbar - Open links in the right email clients, browsers or profiles
Browser Fairy - One tool to rule them all Get virtually as many default web browsers as you want.
Browser Picker - A default browser replacement for windows to let you pick your preferred browser on the fly.