Abstract - A secure, version-controlled hub for your design files
Plant - Version control app and plugin for Sketch
Feature Flux - Ensure your product team is on the same page.
Folio for Mac - Simple version control app for designers
Google Slides - Create a new presentation and edit it with others at the same time — from your computer, phone or tablet. Free with a Google account.
Invision - Prototyping and collaboration for design teams