Helpful article on the Cantina blog (although it should also include Sympli IMO): “For designers and engineers, converting static designs into coded websites and mobile apps can either be a bad game of telephone or a successful jam session. In this article I’ll evaluate three design specification tools that have become popular for communicating layout, color, type styles, and other visual design details: You will gain a basic understanding of Zeplin, Sketch Measure, and InVision Inspect, as well as recommendations for identifying the right tool for your team…”

comparing tools