GBTiler, a Gerber circuit board tiling program allows engineers, electronics hobbyists and other users with Gerber RS274X format files to "tile" or combine separate Gerber files -- circuit boards -- into a single, valid Gerber formatted file.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.