Anyone know of a FREEWARE utility that will convert image files, (JPEG,TIFF, BMP etc. ) to .PDF format?

I'm looking for a new scanner and noticed that HP ( but I don't think anyone else) provide the ability to scan images into .PDF format on some models so wondered if there was a utility that would do the same.

Don't often need the option but it would be nice to have it, just in case.