Many moons ago, I installed an iPhone app called TwitFire. All it did was send a tweet without showing me the Twitter timeline first, but it was surprisingly useful, enabling me to broadcast a single thought to the world without getting distracted by all the other messages. QuickMailer does the same thing for email on your Mac. The idea is that you use a keyboard shortcut or click a menu bar icon, bang out a quick email, optionally add an attachment, and then send it. Since you don’t have to open Mail itself, you can avoid getting bogged down replying to other emails that might cry out for your attention.