Image Converter Software

I've spent hours downloading and rejecting free image converter software. I need a program that will allow me to convert my JPGs to PDF files so that I can put my free charts into PDFs to offer here for my blog readers.

Nothing has worked with my computer. I'm running XP and using Firefox browser.

I have downloaded the free trial of Image Converter Plus. This seems to be exactly what I need, except that it costs $49.99. Does anyone out there use a good free or shareware program?

I have another freebie chart nearly completed. I know the JPGs that I've put up are not the best quality. I'd like to be able to offer my designs as PDFs.