MakerBot
Here are all the 3D printers we could find for MakerBot.
STL Tools
ImageToStl.com - Convert 2D images to 3D STL models
An easy to use tool to create 3D printable STL models from simple 2D image files.
ConvertStl.com - Convert OBJ, 3DS, X3D and VRML files to STL models
If you have 3D model files that you wish to convert to STL files then this is the tool you need to convert your files ready for 3D printing.