TrackDuck - Visual feedback for web design and development.
Invision - Prototyping and collaboration for design teams
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.
Visualtip - A service that allows designers and clients to annotate and collaborate on images in real time
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Pastel - Sticky note-based feedback collection tool for live websites