Covetly - Collectibles marketplace with appraisal tools
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Thinga.Me by Microsoft - Make virtual collections of your real stuff
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Auctionata - Online fine art, antiques and vintage luxury auction house
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.