Coo
Coo is a small mechanical bird given to Annaïg Hoïnart by her mother, and possibly designed by the now-extinct Dwemer. It seems to possess some form of intelligence, as it can be sent off to find a specific person, and can navigate terrain and find the selected person. Once there, Coo maintains a communicative ability between itself and Annaig's Locket, allowing for communication between people great distances apart.
Ingenium
The Ingenium was a device designed by Vuhon to hold the Ministry of Truth aloft over Vvardenfell by consuming souls. This process started by using prisoners and undesirables, which resulted in their immediate death. Eventually, it used souls which could continue to feed the ingenium without causing immediate death. When Sul's lover Ilzheven was taken, he turned on the others, causing the ingenium to crash, setting off the eruption of Red Mountain and killing thousands of Dunmer in the process.
Qijne's Invisible Blade
Also known as Qijne's Filleting Knife, her blade is a magical item which is constantly invisible, and is intangible when not in use. Possibly biological, it wraps itself around the wielder's forearm. When the wielder becomes overcome with rage, it springs into action, deadly sharp and impossible to track. Qijne uses it in multiple executions and battles. Shortly after her death, the blade attaches itself to Annaïg's arm.
Tales of Southern Waters
Tales of Southern Waters is a book that is on the shelf in Sul's room in the Lank Fellow Inn in Chorrol. He takes its presence as a sign from Azura as to where to go next.
The Most Current and High Adventures of Prince Attrebus
The Most Current and High Adventures of Prince Attrebus is a book that is on the shelf in Sul's room in the Lank Fellow Inn in Chorrol. There is an engraving of the prince on the frontispiece. Sul recognizes Attrebus' face from his dream, and takes it as a sign from Azura that he should find him.