Flatland is an internet enabled desktop app that runs 3D experiences called spots. These spots are written in 3DML, an HTML-like description that makes it easy to place and customize 3D building blocks on a grid. Blocks come in sets (blocksets) that the app downloads as needed. Spots can be created in the app itself by switching to builder mode where blocks are placed easily on a world grid. The resulting spot is exported to your hard drive and can be uploaded to any online storage service. Full 32 bit textures are supported and can be stored online as well as you would for any web page.
To see all the spots go to spots.flatland.com and you can copy URLs to .3dml files directly to the app.