Fiverr.com just this past month. So, far I am very pleased with the results. However, I have only one complaint I will touch on later. This site allows users to sign up and place online ads for things they will do for $5.00; hence the site's name. For example, a writer can post that they will write a certain amount of words for the $5.00 or someone my provide reminder text for an allotted amount of time for the $5.00. Then, other users will purchase this service.
The initial sign up and posting of ads are free, but there is a $1.00 fee per each time the seller sells their service (they are called gigs). Therefore, they actually make $4.00 per sale. This is not my complaint. I have a small issue with the several days of wait time before you can retrieve your earned money (via PayPal), but this is common on most sites like this.
Overall, this is a great way to make a few extra dollars each month and the more gigs you post the more earning potential you have. Although, I only have one gig posted at the time, but have sold eight of them and counting. If you have a skill you feel you could market, this is a great place to start and I recommend it highly (just don't forget the payout wait time).
Fiverr International Limited
14 HaMelacha Street, Bina Building, Floor 2, Birmingham, Israel 30500