Where can one find and play Monopoly online with friends?

board-games.pogo.com/games/monopoly

monopoly.com

baconandcheese.com

the best site to play monopoly without sownloading is Pogo.com and search MONOPOLY, and done!

You can also play Online monopoly at onlinemonopoly.co.uk, you can play for free just to get the feel of the game, and you don't need to download anything as online monopoly is a fully online game, so no particular additional software required, you just need an internet connection and a internet browser to open the website.