You may procurar FanFiction.net. Go to the Books section, choose Harry Potter and once there, set the procurar to Voldemort/Tom Riddle as character.
Strangely enough, some of these fanfics involves humour, making obvious fun of Voldemort, in a context where he's the boss but with a wicked funny tone to it. Some other stories are darker. Just check them out !
