This document summarizes and compares several design collaboration, version control, and handoff tools including Abstract, Sketch Cloud, Plant, Avocado, Zeplin, and Invision. It focuses on comparing Zeplin and Sympli, noting that Sympli allows exporting slices directly for iOS and Android instead of downloading and importing. The document concludes that Sympli may be more efficient than Zeplin for handoff due to direct slice export and ability to merge changes and apply styles.