Want to make a simple table? Here you go! OpenSCAD source code allows you to change a few simple variables so that you can make your own table. The corners of the table and the legs are rounded for a nice, smooth finish.

Print upside down ("top" on your build platform) so that you don't need support material.

The STL (and the photos) show a 80x65mm surface, on 4mm legs that are 36mm tall. The surface is 1mm thick, which is remarkably sturdy. (I print 0.2mm layers on my PrintrBot Jr, so it's 5 solid layers of PLA.)