TrackDuck - Visual feedback for web design and development.
Start on Android by Google - Developer program to optimize your app before you launch
zipBoard - ZipBoard is a web-based visual bug tracking & issue tracking tool that helps developers, testers and project managers collaborate during website and elearning development.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Visage - Visage is a new platform that enables non-designers to easily create beautiful, on-brand visual content such as data visualization, reports & much more