Ike Chuang has just released a package enabling quantum circuits for quantum computers to be drawn easily (link.)
With standard tools, quantum circuits are a pain to draw. When writing our book on quantum information, I would sometimes email Ike a request for a circuit (usually a scanned hand-drawn image), and two minutes later a beautiful eps file would show up! I’ve never used the package Ike has created, but I’m pretty confident it will be extremely useful for that small group of people who regularly draw such circuits.