Dragon Armor

Drachen Rüstung (Skyrim) The Dragonplate and Dragonscale Armors can be found and crafted in The Elder Scrolls V: Skyrim.

Characteristics
In order to craft these armours you must choose the Dragon Smithing perk, which requires 100 points in Smithing. Starting around level 50 you will be able to find the armour as random loot from chests (Note: has been found at lower levels very rarely, and may be based on when you take the perk). You can only obtain this armor if you have the Dragon Smithing perk, or use console commands.

Dragonplate Heavy Armor and Smithing
Note: Armor values shown are base value. Actual values in game will be higher and vary with character skill and perks. A full set costs 10 Leather Strips, 13 Dragon Scales and 6 Dragon Bones. This is the second best armor in the game (only slightly weaker than Daedric) but due to the greater availability of dragon scales and dragon bones in comparison to ebony ingots and daedra hearts, many players will first craft themselves dragon armor. And if you're planning on improving each piece of armor immediately after forging, it will take an additional 2 Dragon Bones and 3 Dragon Scales. Video guide on the Armor and how to make can be found here.

Versus Daedric
Of all the heavy armors, Daedric armor still beats dragon armors in base rating, despite a higher skill is needed to make the dragon armors. However, if you upgrade Dragon and Daedric with maxed out upgrades, (Smithing of 100, Blacksmith Potions, and other smith enhancing items) you will find that Dragon becomes superior to Daedric. Technically, Dragon's armor rating will still be below Daedric's, but both ratings will be far over the armor cap of 567 (for example, Dragon would be at around 700 and Daedric around 770). At this point, Dragon is superior because it weighs far less than Daedric, as the extra armor over 567 is useless in most cases. (Unconfirmed: Afer all enchanting is done on armor, Dragon MAY have higher armor rating, although anything above 567 is useless.)

One reason that some may choose Dragon over Daedric is the availability of materials. Ebony can be difficult to find (Although, enough Ebony ores for a full Daedric set and full upgrades can be found at Gloombound Mine), and costs 200-400 gold per ingot from most blacksmiths. The Daedric pieces all require a Daedra's heart, which itself is rare. When bought, hearts costs about 300-900 gold a piece. However, a good stock can be obtained from the Shrine of Mehrunes Dagon (4 every 7 in-game days). Dragon Scales and Dragon Bone can be obtained for free by killing a dragon. These items are very heavy though (compared to Ebony and Daedra heart) and also cannot be found anywhere except on a dragon.

Dragon plate is lighter for those without heavy armor perks - the armor segment alone weighs 10 points less than that of the Daedric.

The primary drawback to Dragon Plate is the need for an extra perk to craft it, and the fact that the perk does not provide weapons.

Note: Another problem is on certain races such as argonians, the back of the Dragonplate Helmet (the bony parts) will not appear. This may be a glitch/bug.

NPC Reactions
Occasionally, when walking by a guard, they will whistle and say "Is your armour made from... dragon bones? By the gods, what I wouldn't do for a set of that."

Bugs
When wearing Dragonplate armors and carrying additional dragonplate armors, the weight of the other armors are completely negated. (PC)

Dragonscale (light) armor and smithing requirements
Note: Armor values shown are base value. Actual values in game will be higher and vary with character skill and perks. It takes 10 Leather strips, 4 Leather, 14 Dragonscales and 7 Iron Ingots to make a full set of Dragonscale (including shield) Video guide on the Armor and how to make can be found here.

NPC Reactions
Occasionally, when walking by a guard, they will whistle and say "Is your armour made from... dragon scales? By the gods, what I wouldn't do for a set of that."

Versus Glass
As far as light armor are concerned, the dragonscale armor starts at a higher base armor than glass, meaning that it is the best available light armor.

Crafting a suit of Glass armor can be harder to find and more expensive compared to collecting dragon scales. There is a Malachite mine in Kyne's Grove south of Windhelm. Dragon scales, however, are worth the items you put into them (EG: poisons, arrows, etc.). You'll probably wind up getting a good stock of them just wandering around the wilderness. A single dragon usually provides enough scales for a single piece of equipment.