19) Imagaro Z
Imagaro Z is an auto tracing and typeface identification application. It's available for Macintosh OS 10.2 and 10.3 and Windows 98 or higher. The program creates vector graphics from bitmap files or scanned objects. Price: USD $690
http://graphicalsystemsusa.com/t-imagaro_z.aspx

18) potrace
potrace is a utility for tracing a bitmap, which means transforming a bitmap into a smooth, scalable image. The input is a bitmap (PBM, PGM, PPM, or BMP format), and the default output is an encapsulated PostScript file (EPS). A typical use is to create EPS files from scanned data, such as company or university logos and handwritten notes. The resulting image is smooth instead of "jaggy" like a bitmap. Then, it can be rendered at any resolution. Its output formats include EPS, PostScript, PDF, SVG (scalable vector graphics), Xfig, Gimppath, and PGM (for easy antialiasing). Additional backends might be added in the future. This is open source (free) software distributed under the GNU GPL terms. Price: Open source (free)
http://potrace.sourceforge.net/

17) R2V Raster to Vector Conversion Toolkit
This software converts architect, mechanical and various technical drawings, maps and other types of line artwork including black and white graphics for books and journals from raster to vector formats. This means that a paper drawing can be scanned, line artwork automatically recognized and represented in a vector format that you can import to your CAD or drawing program. The company also has AlgoLab Photo Vector, which converts images into a vector image. Price: USD $99 (R2V), $58 (Photo Vector)
http://www.algolab.com/r2v.htm

16) Acme TraceArt
TraceART is a professional raster-to-vector conversion program. It lets you quickly convert uneditable scanned paper drawings into accurate vector files for editing in any CAD program. It saves the converted file as an industry standard DXF file (Data Exchange Format) that any CAD program supporting this format can read. TraceART is a direct replacement for traditional tracing and digitizing. Price: USD $79.50
http://www.freefirestudio.com/traceart.htm

15) Turning bitmaps into vector graphics with Flash
Old article showcases a Flash 3 function called Trace Bitmap that works better than anything else in turning PICTs, TIFFs, JPEGs, BMPs, and even WMFs into vector graphics.
http://www.creativepro.com/story/feature/2375.html