3D Printer roundup

From the article 3D printer Roundup by hotardware.com:
3D printing is a fascinating new technology and an exploding new market. The process involved is pretty basic actually. Heat up some plastic, and sort of like that Play-Doh Fun Factory you were so fond of as a kid, you extrude the melted plastic out to create objects of magnificence -- because you built it yourself. However, 3D printers are much more akin to their cousin the 2D inkjet printer, though objects are being printed not only on the traditional X-Y plane but with that magical third "Z" dimension of height. In addition, advancements in 3D CAD software packages like Google SketchUp (now a product of Trimble) are making it increasingly easier for the novice DIY designer and budding 3D model artist to make their own designs a reality. It all started back in 2007 when the first RepRap machine was built. The idea behind RepRap was to design a machine that could build complex parts in three dimensions using extruded molten plastic and that machine could also "self-replicate" or build a copy of itself. Also, RepRap is a fully open source project that draws on the collective resources of its community to further advance the technology and the vision of the "Self Replicating Machine." Since then 3D printers of all types have emerged from the community, from almost household names like MakerBot, (one of the largest player in this space, now a proprietary product) to the likes of Solidoodle, PP3DP, and 3D Systems, a pioneer in StereoLithography that invented the STL file format. STL is also known as Standard Tessellation Language and it's the file format that is widely used for 3D printers, like all of the machines we're going to show you here in this review. Gamers, you may recall the word "tessellation", as it is a key feature in DirectX 11 and OpenGL 3D graphics rendering. Tessellation helps define datasets for rendering 3D structures in the virtual world as well as the real world, in the case of 3D printing. (...)