Bumpr - Open web and email links in different browsers/email apps
browserling - Live interactive cross-browser testing from your browser.
MenubarX - MenubarX.app is a powerful Mac menu bar browser that can pin any webpage on your menu bar just like a native App.
BrowserStack - BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.
Enpose - The simple screenshot bot
Browsershots - Browsershots makes screenshots of your web design in different browsers.