HOUSTON--(BUSINESS WIRE)--Changing Technologies, Inc. (OTCBB:CHGT) is ready to debut its game-changing 6d3d.com three dimensional printing portal, a unique site that promises to alter the way content designers, creators and printers interact with one another. The innovative portal, scheduled to launch September 24, will provide users access to a full set of powerful prototyping and fabrication resources via additive manufacturing. Artists, engineers and content makers can use the portal to prod