Are there any softwares which can be used to convert the raster files to vector files?

You can use Adobe Illustrator, Streamline, Corel Draw for auto vector conversion, but the results are not perfect. The circles and curves are not upto the standard. The best way to get a vector conversion is to trace it using PEN tool. We use Adobe Illustrator with Wacom tablet which are industry standard software and hardware to trace bitmap image into a vector artwork.