https://habitrpg.com

It's a site where you turn your to-do list into a classic RPG. Earn experience and level up as you complete tasks, avoid procrastinating by watching your health, and trade in your hard earned gold for weapons, armour, or rewards of your own choosing. My favorite part is when you level up enough to start finding pets!

It's a really great site—it helps me keep my list of things to do in order, it pushes me to do things when I might procrastinate otherwise, and buying a new sword or finding a new pet helps keep me going.

There is a party feature, but I don't think it's working yet. Once it does, we could form a GT party. ;)