One option: RootsMagic Essentials. This is a limited version of the program that you can download for free. I believe it is PC only, no Mac version. Some of the other programs may have trial versions, but I have not used those.
Another option: you can take your gedcom to a FHC and use one of the several programs they have for patron use. These are Ancestral Quest, Legacy, and RootsMagic. These are full versions, and not the limited trial versions.