TrackDuck - Visual feedback for web design and development.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
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.
Sketch - Professional digital design for Mac.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Invision - Prototyping and collaboration for design teams