For reading purposes- in order to inspire you- 2 of the best fantasy novel settings with gear that mimic modern goods are Terry Pratchett's
Diskworld series and Harry Turtledove's
Darkness novels.
In
Diskworld, for example, there are all kinds of gizmos like cameras and PDAs that are mimicked by boxes containing tiny gremlins who paint or take notes very quickly.
In his
Darkness stories, HT is telling the story of a world undergoing its own fantasy version of WW2. In it, you see troops carrying rechargeable wands and staves that replace handguns and rifles, tanks simulated by immense, armored beasts carrying soldiers with larger versions of the staves, air forces comprised largely of riders of wyvern-like fire breathing dragons, and even fantasy analogs of the Manhattan Project and a necromantic Final Solution/Holocaust.
Other things that have popped up in similar threads and in the writings of other authors:
1) Mills, paddlewheels and similar technologies powered by automatons (like golems or clockwork beings) or undead (skeletons and zombies). They don't need rest, they don't need sustenance- used this way, they are essentially sources of infinite energy, albeit at a generally constant and leisurely pace.
Instead of fuel, the limiting factor would be replacing the gear and machinery that wears down through their constant use, and in the case of the undead, possibly the hazards of getting a bit too close...
2) Elemental or magical flames being used as incinerators or in forges. They may also be used in boilers that power steam engines, opening up the world of all kinds of steam-powered vehicles...including cars and trains.
3) Use of elemental or magical ice as "aircraft carriers" or similarly large ships. (Historical side note: something like this was actually proposed during WW2- and emulated in HT's novels- by George Pyke, and would have been made of Pykrete [a mixture of wood pulp and ice]. See
Project Habakkuk - Wikipedia, the free encyclopedia)
4) Anything that produces unending flows of elemental or magically produced water can be used to power a paddlewheel or mill as well (see 1, supra), and has the additional benefit of being useful to limit the efficacy of a siege. Water is essentially non-compressible, so if the rate of flow (from something like a Decanter of Endless Water
http://www.d20srd.org/srd/magicItems/wondrousItems.htm#decanterofEndlessWater) is constant, focusing that flow through narrow apertures results in a deadly jet of water.
5) Airships can be powered by elementals or magic. Those may be zeppelin-like, or may have a shape akin to ironclad or masted ships (see T.Brooks'
Jerle Shannara books or the RPG products Spelljammer and Space: 1889). "Tamed" elementals may also be used for propulsion by standard masted ships as well.