Tunelator processes tunnel profile data for surveying work. It provides a powerfull grid editor, 3D preview, export to Prowin, Ispol, MDT and DXF (2D and 3D views with convenient layering).
Metaquokka is a highly configurable xml editor, currently available as Gridsphere portlet. Besides the default format, there is suppoert for ESysXML, a simulation description scheme for a geodynamics framework. Supports Generic Mapping Tools rudimentary.