Stealing this from a 3rd party site, that I'm certain isn't allowed to be linked here. Just know it's a "Core of being Owned".
Speed Increasers
Falling Flame - combined with Goblin Glider, you can fly with 1400% speed - Insane for no fly zones.
Goblin Gliders - Obviously amazing, especially in bad terrain.
Darkmoon Cannon - Good for getting across canyons or up somewhere instead of taking a detour
Checkered Flag - 30% mount speed for 10 minutes
Draenic Swiftness Potion - 200% swim speed for 20 seconds
Skystep Potion - 150% run speed 8 sec
Felslate Anchor - if you need to dive down to a cave or something, this takes you down super fast
Leystone Buoy - Getting back up from deeper water
X-52 Rocket Helm - Shoots you up high in the air, can be combined with glider to not have to walk around objects etc, or getting up to annoying places/treasures.
Cracker Radinax Control Gem / Oddly-Shaped Horn / Tuft of Yak Fur - 20 sec super fast ground mount, like 3x mount speed.
Gunshoes - Engineering item, instant use, 3 min cd, faster than mount speed movement and no cast time.
Enchants - 100 Mastery + 2% run speed enchant on cloak
Rocket Boots Xtreme - running fast in caves etc, requires equipping though
Consumables
Carefully Hidden Muffin - Instant food buff
Sugar-Crusted Fish Feast - 1 sec to apply food buff + super health regen.
Fighter Chow - 400% Out Of Combat regeneration
Bear Tartare - Speed increase on kills
Crispy Bacon - Prolongs your food buff if you arent a muppet that dies =D
Flasks
Potion of Prolonged Power / Old War etc
Tome of the Tranquil Mind - Might be handy if you encounter something hard
Drums of the Mountain
Other
Battle Standard of Coordination 15/10/5% Versions - Gives 15% experience gain from kills within 100 yards, or 10% or 5% depending on which you use. They dont share CD so you can chain them. Use whenever you reach an area you will kill shit in.
Deployable Bullet Dispenser - Extra damage
Gunpack - Shoots you up in the air in small bursts - Situationally helpfull
Swapblaster - If you level in a grp, you can swap people to places that arent easy to get. Thus saving time by you getting to the place while they do something else.
Ultimate Gnomish Army Knife - Cause who isnt an Engineer!