Did a quick check of the DB and the following weapons do fatigue damage:
Code:
509 Bane of Heresy #1 15 ap nostr sacred only
160 Cold #1 20 ap cold bonus wp nostr
222 Cold #1 12 ap cold nostr
53 Debilitative Poison #1 20 an poison nostr mres
228 Elf Shot #1 100 an nostr mres
413 Fatigue and Disease #1 20 an nostr
345 Fly Whisk #1 0
387 Sleep Touch #1 30 nostr mres
71 Sleep Vines #3 33 bonus wp nostr mres
411 Small Area Stun #1 10 an nostr
91 Stun ¤1 0 ap
88 Unconsciousness ¤1 110 an nostr
The #x means number of attacks the weapon has. All count as magical weapons. The second number is damage and the rest are other properties.