Bedder is the easiest way to choose the right sized mattress.

No measuring tape required -- Bedder uses augmented reality to display the six standard mattress sizes (twin, twin XL, full, queen, king and cal king) in your home before you buy them. Dimensions are accurate to within 2%.

Arxiv Vanity renders academic papers from Arxiv as responsive web pages so you don’t have to squint at a PDF.