As Businessweek notes, it took Autodesk, the 3D and CAD software company best known for its industry-standard software AutoCAD -- nearly 30 years to build up a customer base of 12 million customers. But a single iPhone app -- the $2 Sketchbook Mobile, released almost exactly two years ago -- has increased the company's user base by almost 60 percent, bringing in seven million new users. The company also saw a 14 percent rise in revenue.
