Currently only a few packages (Kate, Krita, etc.) build AppImages on the Binary Factory from the Craft blueprints (see rkward for details). gitlab can also build AppImages (see kstars for details).
Binary Factory: "This CI system is intended to generate binary installers for macOS and Windows, as well as AppImages for Linux for the set of KDE projects which support these."
We now have Release and Nightly builds of latest Stable and master:
https://binary-factory.kde.org/view/AppImage/job/Labplot_Release_appimage-centos7/
https://binary-factory.kde.org/view/AppImage/job/Labplot_Nightly_appimage-centos7/
Links: