Cost: Free Contemporary design flash sales site Fab.com is growing like gangbusters. The company has already carved out a niche for itself in the crowded homewares space (think One Kings Lane and Gilt Groupe), accumulated 750,000 members in less than six months and raised $8 million in funding. Fab's recently launched Android app is similar to its Web site: Slick, beautiful and easy-on-the-eyes. Users can browse through the site's carefully curated selection of home goods from vintage typewriters to cashmere pillows and photography books and make purchases on-the-go. The app will also notify users when a new sale is starting and when an item in their shopping cart is going to expire. There's also a calendar of upcoming sales and sharing capabilities through Facebook and Twitter.