Is there any other software than cad which can help me to convert images from raster to vector ? I've done few raster to vector conversion through cad anyone can check those here http://www.logiseek.com/raster_vector.php but I need to know about other software please help.
Depending of what images you would like to convert. If the picture looks already as it was a vector based you can automatically convert it using tools such as Trace Bitmap in Corel or Live Trace in Adobe Illustrator. Even Flash has a tool to trace bitmap. Check some videos on YT to see them in action. However, all of the tools usually will require manual improvements. Used algorithms for example don't recognise a circle and convert circle to rounded shape consisting of number of segment but the tool will not come up on use of built in "circle" tool whereas human will do. At the end of the day ideal converting process can be done only manually but if the accuracy is not the subject you have a few tools that can converting with quite good results.
I've used MagicTracer and VectorMagic. Years ago I purchased a very expensive ($300+) photoshop plug-in to do this, never learned how to use it well enough, but I think there are better options these days.