graphic converter

For a long time, I was looking for a software to convert various image formats like BMP, GIF, JPG, PNG and many others. So I was searching online and then I found this software http://www.graphics-converter-pro.com. But I have to pay 49$ to use all the functions of this software. Now I am looking for similar softwares. So if anyone knows other alternatives, please reply here and message me.
Thank you!!

http://www.zamzar.com/ is free and works well. I've use it in the past.

they convert many things:

Document formats
Image formats
Music formats
Video formats
e-Book formats
Compressed formats
CAD formats