F.lux is essential for us night owls! LastPass is my password saver. Non-essential (not for me) is background music from Pandora (my own station Esp. Deep Relaxation Mix) is exceptionally soothing while doing any computer work. You can program whatever station you like. I love Webshots, screen saver & wallpaper (free & pd. versions available with new photos daily). The creative among us need beautiful music & visuals to work our best.