.ARTPROJ files are Bug tracking project files that have been created with the Artifacts software. Artifacts is a file-based and version control friendly bug tracking program, defect managemet, and testing tool for use in the testing and post-production phases of a software project. .ARTPROJ files include a list of artifacts (made up of .ART files). These files may contain items such as bug, labels, tests, and ToDo lists, to be utilized and viewed from within the Artifacts application exclusively.