I have been promoting my contest to sites that list giveaways and stuff, I thought it could make an interesting post, so here is the list of competition and contest sites I have posted to.
https://www.contestblogger.com/ Easy to add to and they get listed instantly
https://www.myblogcontest.com/ Have to register and wait for contest to be reviewed
https://itsallfreeonline.com/ Lists all kinds of free stuff
Make sure you keep this list handy for the next time you are having a competition or contest on your site.
The list used to be bigger but most of the sites that were listed are now dead.