I've always been fond of loaidng capsule rounds with Narcoject and DMSO. The combined stun damage from the impact of the capsule round and the Narcoject will drop most targets. However, the Narcoject is technically not supposed to take effect until the end of the Turn; some GMs house rule it to work immediately, but officially it works a little too slowly for use in a firefight.
Stick-n-Shock, as has been mentioned, is fairly effective. Additionally, gel rounds and capsule rounds deal stun damage, and depending on the weapon, may deal more damage than SnS. Sure, the armor isn't halved, but impact armor on a geneeric NPC tends to be pretty weak anyway. Tasers work quite well, as well.
Stunball and Stunbolt work
fantastically well. Any half-decent PC mage can dish out stun spells at high Force all day long with little chance of Drain, and be almost certain that they'll drop any target that doesn't have Spell Defense.
Grenades of either Flashbang or Gas with Neurostun variety are also available. If you're running without at least a Gas Mask, if not a Chemical Seal, then you won't be running long.
The game is full of non-lethal options, and unlike a lot of other games they actually work pretty well without placing you at a disadvantage, so players are actually willing to use them. Killing guys just doing their job is bad for business, and easy to avoid.
But then so will Orgy... a spell I do not like at all.
Neither do I. I'm glad that nobody has ever tried to take it in a game I've been in, because it creeps me out. There's no way that casting this on people without permission wouldn't qualify you for membership on the sex offender registry in the Sixth World.