SourceTree - Mac and Windows client for Mercurial and Git.
Covetly - Collectibles marketplace with appraisal tools
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Thinga.Me by Microsoft - Make virtual collections of your real stuff
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Lofty - Trusted Marketplace for Fine Arts, Antiques and Collectibles