Inexpensive graphics packages

Could someone please give me some advice about which graphics packages out there are the best value for money? Also, are there any trial editions that I can download from the net to test out?

Adobe do 30 day trails. There products are, in my opinion, by far the best out there though distinctly not inexpensive, so lets move on.

For my graphics I use freeware programs; for rastor graphics The Gimp is decent, worth a look. Inkscape is my vector graphics program, just keep in mind it's in early stages of development (techncially they havn't released Inkscape 1.0 yet) and as such had it's share of bugs, and prehaps missing a few features here and there. I still reccomend it.