Wallapop - Wallapop is a free mobile app that acts as a virtual flea market for buying and selling items locally.
Trove Market - The easiest way to buy/sell used + vintage furniture
Feather Icons - Simply beautiful open source icons
Twice - Online Secondhand Clothing Store
Modsy - Interior Design You Don't Have to Imagine. See your exact room, expertly designed in 3D with actual pieces of furniture from well-known retailers that you can buy on the spot.
Kidizen - Kidizen is the top marketplace to buy and sell kids' fashion. Shop thousands of your favorite brands at up to 70% off retail. Sell your kids' and women's.