FICTIONAL EXOSKELETONS
Movies
Aliens:

James Cameron's Aliens released in 1986 featured a robotic exoskeleton for lifting heavy objects. This "Power Loader" was used to fight off an alien at the end of the movie.
Wallace & Gromit- The Wrong Trousers:

Wallace and Gromit have an adventure with a lower limb exsoskeleton in this 1993 animation. Wallace gives Gromit a pair of mechanical trousers for his birthday, i.e. "Techno Trousers".
Science Fiction Novels

Starship Troopers by Robert Heinlein
Fallen Dragon by Peter Hamilton
Comic Books
Batman Beyond:
The robotic batsuit worn by Terry McGinnis in Batman Beyond gave Terry the strength of ten men.
Dr. Doom:
The robotic exoskeleton worn by Dr. Doom allowed him to lift approximately two tons.
Iron Man:

Iron Man's armor enabled him to lift up to 70 tons!
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