AppVeyor is an automated continuous integration and delivery platform that helps developers automate their software development process. It allows developers to build, test, and deploy their applications quickly and easily, ensuring that their code is always up-to-date and ready for
From Wikipedia
AppVeyor is a hosted, distributed continuous integration service used to build and test projects hosted on GitHub and other source code hosting services on a Microsoft Windows virtual machine, as well as Ubuntu Linux virtual machines. AppVeyor is a privately held Canadian corporation founded in 2011.