Sneaking Potion 30 stealth points
Stealth of the Stalker 8 stealth points
Booths of Displacement 8 stealth points
Darkmantle Boots 8 stealth points
Silent-Strider Kneeboots 5 stealth points
The Master's Treads 5 stealth points
Whisperwalk Boots 5 stealth points
Nightscape Boots 5 stealth points
Figurine - Nightseye Panther 5 stealth points (No longer increases stealth level as of 3.2.)
Formula: Enchant Cloak - Stealth 5 stealth points
Formula: Enchant Cloak - Shadow ArmorBlack Pearl Panther 3 stealth points
Master of Deception Each point is worth 3 stealth points
Feral Instinct Each point is worth 5 stealth points
Shadowmeld 5 stealth points
Patch 2.1.3
p.s.
Stealth decreases the range at which players and mobs can see you (and thus, react). Druids have an invisible "stealth skill" called Subtlety that doesn't appear on their character sheet and always increases by 5 for each level (thus at level 70 you have a base Subtlety skill of 350). All characters also have a Stealth Detection skill, which also doesn't appear on their character sheet and always increases by 5 for each level (thus at level 70 you have a base Stealth Detection skill of 350).
At equal levels of Subtlety and Stealth Detection, a stealthed character can be seen 5 yards away. Each 5 points of skill changes that range by 1 yard either way, up to a maximum of 10 yards and a minimum of 1 yard. So for example:
* If a stealthed cat has a Subtlety of 350, a Stealth Detection of 340 could only see him 3 yards away
* If a stealthed cat has a Subtlety of 350, a Stealth Detection of 365 could see him 8 yards away
* If a stealthed cat has a Subtlety of 5, a Stealth Detection of 400 could see him 10 yards away
Keep in mind that Stealth Detection only works for your frontal 180 degree cone. A level 1 cat could sneak up on a level 70 human warlock with
Perception popped,
Hyper-Vision Goggles, a
Catseye Elixir, and a
Felhunter (As of patch 3.0.2 this spell (
Paranoia) has been removed and was replaced by
Fel Intelligence) out, and still be undetected as long as the cat approached from behind.
So if you are a level 22 character and have 15 stealth bonus points, you will be as difficult to detect as a level 25 character with none
Source