I'm looking for tools and extensions in open source platforms (gvSIG, QGIS, uDig, etc) that allows 3D snapping.
In the last years, most of the projects my company is working on required the editing of 2.5D cartography. 3D snapping is a crucial feature for these projects. And the designers fell more comfortable using CAD tools (like Microstation Geographics) for digitalizing and editing on this projects. ArcGis 9.3 with a 3D snap plugin is used in the second half of the editing part (soon will use ArcGis 10).
Now my company wants to start working with open source platforms (hooray!), and the 3D snapping seems to be one of the main holes in the open source GIS platforms.
Do you know anything could be useful on this subject? Tools, extensions, initiatives, etc.