I made my own superhero long ago. He's an interesting character with one of those names you'd get from the Golden Age of comics (which is why I'm afraid that he's already been done) but anyways, his name is DINOMAN. I've altered his origin quite a bit.
It's a classic origin, as a kid, his parent are killed by a "ganglord" and the kid is thrown into "exile" for years as he grows up in the streets, turning his home into his "playground" like it's usually said. Anyways, he grows up, gets a job, and starts making money, but he still lives on the street. He dawns the costume and becomes "Dinoman". He swears vengeance on the man who killed his parents.
We soon find out that the name of the ganglord is "Bobo". (funny name) He originally had a design very similar to Kingpin, but then I changed it. He almost resembles "Nosferatu". He's big, fat, and has a hunched back. He begins waves of crime searching for Dinoman who has been taking out his henchman. Events lead to one another, and Dinoman and Bobo meet face to face. They duel, leaving Dinoman as the loser, and Bobo supposedly dead.
I've come up with other characters such as:
Dr.Lazer!
and
Frogger
Dr.Lazer: Scientist who develops a formula to turn him into a floating mass of electricity at will.
Frogger: Human who has been mutated into a frog due to radioactive incidents. He's dubbed the name Frogger, due to his many attacks on the streets.
There's a lot more, but that's just a little taste of it.