Avoid SpamKiller, the anti-spam shareware utility published by McAfee. Whenever it captures a piece of spam, it utters a hideous, barking, crunching sound, as if Cerberus, the three headed demon guard dog of Hell, had just clamped its infernal jaws around the thighbone of an intruder. Even if you turn off the sound effects, it crashes frequently and hard.
Anyone have better suggestions?