Helium

I have been a member for over a year with them, and though it's not great money, they do offer a marketplace.

What I like about Helium is that you can write articles and rate them, it's a community effort. Also the fact that they have a marketplace, where you can earn real money is good.

I have fun on that site, and I am just starting to use it again.

So join it, it can be loads of fun!