The Keepers of Time are a faction of the Bronze Dragonflight – loyal to the Dragon Aspect of Time, Nozdormu the Timeless One. The Keepers of Time Quartermaster Alurmi can be found at the Caverns of Time, near the reagent vendor. To gain reputation with the Keepers of Time you may go to Caverns of Time: Durnholde (lvl 66) and Caverns of Time: Dark Portal (lvl 68-70). Caverns of Time is located in Tanaris (Kalimdor).
The Keepers of Time Quartermaster offers 15 items ranging honored, revered and exalted. The items appeal to the following tradeskill/professions: Jewelcrafters, Enchanters, Alchemists and Leatherworkers.
Some socketed-gear may appeal to the following Classes: Paladins, Mages handling swords, Rogues, and Priests.
Glyph of Frost Warding adds resistence to a head slot which may be used by any character class. The Glyph of Defense is a most to any Warrior. The Timelapse Shard trinket looks good for priests and mages to reduce threat. However, any class will really love the +25 stamina on the trinket, so go for it.