-Engineer-Only Schematics-
In Outland there are some schematics that Bind When Picked Up and can only be obtained by an engineer. If you want to learn these schematics you must obtain them yourself. You do not need to have the proper level to learn them for them to drop, all you need is to have the engineering profession. The schematics are:
Felsteel Boomstick- Requires level 360 Engineering to learn and the schematic is dropped by Doomforge Engineers in Blade’s Edge Mountains. The gun requires level 70 and Binds When Equipped.
Khorium Scope- Requires level 360 in engineering to learn and the schematic is dropped by Sunfury Bowman in Netherstorm. The scope requires level 55.
Hyper-Vision Goggles- Requires level 360 in Engineering to learn and is obtained from Mo’arg Weaponsmiths in Shadowmoon Valley. The Goggles are Leather and Bind When Equipped.
Field Repair Bot 110G- Requires 360 Engineering to learn and is dropped from Gan’arg Analyzers in Blade’s Edge Mountains, on the western plateau, which requires a flying mount to get to. Sells reagents in addition to repairing, and has 5 charges.
Adamantite Arrow Maker- Requires level 335 in Engineering to learn. Obtained from Sunfury Archers in Netherstorm. Creates 5 stacks of 200 adamantite arrows.
Rocket Boots Xtreme- Requires 355 in Engineering to learn, and is dropped from Mekgineer Steamrigger in the Steamvaults. The boots are leather and Bind When Equipped.
Rocket Boots Xtreme Lite- Requires 355 in Engineering to learn, and is dropped from Mechano-Lord Capacitus in the Mechanar. The boots are cloth and bind When Equipped.
-Pets-
Engineering allows you to create a wide variety of pets. Combat Pets and One-Time-Use pets usually have a "tag" under their names with the name of the player than created them ([Player]'s Guardian). They CAN be used in conjunction with hunter/warlock pets, but you DO NOT have direct control over them. Let me also say I use "pet" as a broad term for anything that you create into the world. You may have a hunter/warlock pet, a "guardian" and a non-combat pet out all at once.
Non-combat pets: Non-combat pets are those that serve no purpose other than to follow you around. They can be used as much as you like and do not die. Most do not require engineering levels to use, so you can sell them or give them to friends
Mechanical Squirrel
Tranquil Yeti
Lifelike Mechanical Toad
Pet bombling (Binds on pickup)
Lil Somkey' (Binds on Pickup)
Crashin’ Thrashin’ Robot (Binds on Pickup)
Combat Pets: Combat pets are pets that you can summon to help you fight for a limited time, they can also be used as much as you like (They do have cooldowns between uses though), usually taking the form of trinkets. They do not "die", if they are killed you must simply wait for their cooldown before you can use them again. They do require engineering to use.
Mechanical Dragonling
Mithril Mechanical Dragonling
Arcanite Mechanical Dragonling
Gnomish Battle Chicken
Goblin Bomb Dispenser
One-time-use pets: One-time-use pets are those that have "charges", which means they can only be used a certain number of times before you must make more. They have a variety of purposes from aiding you in combat to acting as vendors, or even explosives. They do require engineering to use.
Target Dummy
Advanced Target Dummy
Masterwork Target Dummy
Compact Harvest Reaper
Explosive Sheep
Goblin Land mine
Alarm-O-Bot
Field Repair Bot 7A
Gnomish Flame Turret
Field Repair Bot 110G
-Engineering for Profit-
Although Engineering usually costs you more than you make, there are a few items which can be sold to other players for professions and quests.
Non-combat devices: Most non-combat pets and fireworks an engineer makes can be sold to other players or given as gifts.
Flash Bomb: A schematic that can be learned after doing the “Pearl Diving” Quest (Obtained at level 30 from Rigglefuzz in the Badlands, by the central mountains). The schematic requires level 185 to learn, but the bomb itself requires no engineering level to use. The recipe requires Blue Pearls from giant clams in the Vile Reef, in Stranglethorn Vale. The bomb causes all beasts within 5 yards to flee for 10 seconds.
Salt Shaker: Learned at 250 Engineering from a trainer. Used by leatherworkers to turn Deeprock Salt into Refined Deeprock Salt.
Aquadynamic Fish Attractor: Learned at 150 Engineering at a trainer. It's a "bait" that is applied to a fishing pole to increase the fishing skill of the player by 100 for 5 minutes. Made in stacks of 3.
Guns, Bullets and Scopes: Engineers have the opportunity to make many guns, bullets and scopes which can be sold to any class which can use them.
EZ-Thro Dynamite: A bomb that doesn't require engineering to use. The first model can be learned at Engineering level 100 from a dropped schematic. The second model can be learned at Engineering level 200 from a schematic bought from Blizrick Buckshot in Tanaris (At Gadgetzan). Both models can be sold to and used by any player.
Green Lens: Although only usable by engineers, these have a random enchantment added when crafted, so you may be able to sell them to an engineer looking for a specific enchantment. Learned at 245 Engineering from a Trainer.
Quests that require engineering items to complete:
Warsong Supplies- (Horde Only) (Obtained at level 22) Given by Locke Okarr in Ashenvale (At Splintertree Post). One of the sub quests requires a Deadly Blunderbuss to complete, which requires 125 Engineering to make, and is learned from a trainer.
Chasing A-Me 01- (Obtained at level 48) Given by Karna Remtravel in Un'Goro Crater (At Marhsal's Refuge). The followup quest requires a Mithril Casing to complete, which requires 215 Engineering to make, and can be learned from a trainer.
That's Asking A Lot- (Obtained at level 52) Given by Smokey LaRue in Eastern Plaguelands (At Light's Hope Chapel). Requires (In addition to 2 Thorium Bars and a Golden Rod) 8 Hi-Explosive Bombs, learned at level 235 Engineering from any trainer. And 8 Unstable Triggers, learned at Engineering level 200 from a trainer, to complete.
The Touch of Zanzil-(Rogue Only) (Alliance Only) (Obtained at level 20) Given by Doc Mixilpixil in Stormwind (In the SI:7 Headquarters) after doing the Mathias and the Defias questline (Rogue Only) (Alliance only) (Obtained at level 20). Requires a Bronze Tube to complete (In addition to a Leaded Vial, Simple Wildflowers, and a Spool of Light Chartreuse Silk Thread) which requires 105 Engineering to make, and can be learned from a trainer.
Look to the Starts-(Alliance Only) (Obtained at level 20) Given by Viktori PrismAntras in Duskwood (At Darkshire). Requires a Bronze tube to complete which requires 105 Engineering to make, and can be learned from a trainer.
Gyro What? - (Obtained at level 35) Given by Lotwil Veriatus in the Badlands (A little east of Kargath). Requires a Gyrochronatom to complete, which requires 170 in Engineering to make, and is learned from a trainer. The first quest in the chain is Coolant Heads Prevail (Obtained at level 35) which requires a Frost Oil made by an alchemist with a skill of 200 of greater. The Frost Oil recipe is bought from Bro’Kin in Alterac Mountains (Near The North West corner).
Gizmo for Warug- (Obtained at level 35) (Requires Magram Clan Centaur reputation at Friendly or higher) Given by Warug in the Desolace (At the Magram Centaur camp) Requires an Advanced Target Dummy to complete which can be learned from a trainer, and requires level 185 in Engineering or greater to make. Part of a questline that begins in the Desolace.
The Ectoplasmic Distiller- (Obtained at level 60) Part of the Tier 0.5 Questline. Requires (In addition to 4 Greater Eternal Essence, 10 Stonescale Oil, and 25 Volcanic Ash) a Delicate Arcanite Converter which requires 285 in engineering to make and the schematic is bought from Xizzer Fizzbolt at Everlook in Winterspring.
Additional Materials- (Obtained at level 67) Given by David Wayne in Terrokar Forest. Part of a questline that begins with a drop from Overseer Ripsaw in Shadowmoon valley. In addition to a Demon Warding Totem and 4 Heavy Knothide Leather the quest requires an Adamantite Frame, which is learned at level 325 engineering from a trainer.
The Soul Cannon of Reth’hedron-(Obtained at level 70) Requires Honored Netherwing reputation to start, and is given by Illidari Lord Balthas in Shadowmoon Valley. The quest requires, in addition to a Flawless Arcane Essence and 2 Felsteel bars, a Khoirum Power Core (Level 350 Engineering from a trainer) and an Adamantite Frame (Level 325 Engineering from a trainer).