SkiftSeedlings: Five travel startups hack rentals, layovers, and gym passes

This week's SkiftSeedlings are looking to innovate during every step of business and leisure travelers' trips, from finding the cheapest vacation rental to making the most out of layovers, to staying fit when the hotel's gym looks like a child's playground. » Get your daily dose of Skift: subscribe to our newsletter, RSS, Twitter or Facebook. For all of our SkiftSeedlings collection, check out our archives here. Apartum is a Spanish search engine for vacation apartment rentals that pulls properties from other online rental sites including FlipKey, HouseTrip, and Interhome. It