Git - Git is a free and open source version control system designed to handle everything from small to very large projects with speed and efficiency. It is easy to learn and lightweight with lighting fast performance that outclasses competitors.
Abstract - A secure, version-controlled hub for your design files
Atlassian Bitbucket Server - Atlassian Bitbucket Server is a scalable collaborative Git solution.
Plant - Version control app and plugin for Sketch
Mercurial SCM - Mercurial is a free, distributed source control management tool.
Folio for Mac - Simple version control app for designers