A RoboFont extension that keeps track of a project. A project is a collection of all open documents in RoboFont and the position of each window. A saved project can be reopened and all windows will be restored.
The extension lives in the 'File' menu: 'Save Project...".
A file with the extension '.roboFontProject' will be saved on disk, paths to document can be relative to the project file. Make sure to tell finder to open that extension with RoboFont.