List of classified ads sites & sites like Fiverr etc.

In the next few weeks I will finish a huge website project and to get an even larger audience (and build some links) I plan to offer my services on as many classified ads sites or sites like Fiverr, Freelancer.com etc as possible.
Which sites could you recommend? As I want to contribute something to this list too, I want to name eBay-kleinanzeigen.de