Minimalistic progress bars showing the cooldown of the both engineer kits
Yellow is goblin glider; Red is nitro boost.
In case you need a macro of those:
Nitro Boost:
/use 6
Goblin Glider Kit:
/use 15
This is a collection of 2 auras:
Goblin Glider (aurabar)
Nitro Boosts (aurabar)