Founded by Antonios Fiorakis, Theodoros Orfanidis, and George Gatos, Incrediblue is based in Volos, Greece, which is a great location for boating — though they offer yachts all over the world. According to the company, most boat owners rarely actually take their vessels on a cruise, instead docking them for months at a time. If you're one of those people, why not rent your yacht out when you're not using it? The company makes it easy by directly connecting you with someone who wants to take your yacht for a spin and all you have to do is register your boat for free.
The site works is similar to a social networking site, with profiles for each boat and experience reviews (for the renter and boat owner). Full of pictures and detailed descriptions, it's pretty easy to find the best match for your travel plans.