Gerber Viewer is a viewer for Gerber files, also called RS274X. It lets you load several files on top of each other, do measurements on the displayed image, etc. Using Cairo makes it possible to export Postscript and PDF files.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release include patches collected over one and a half years. The step-and-repeat command now works. An endless loop bug when gerbv encountered an unknown % code was fixed. Better support was provided for small drill files and window size handling was improved when the screen is bigger than the display. Maintainership has broadened to include several more members of the gEDA project.