I Need Software for 2 Different Things, Can I Just Buy One?

I have som side projects I want to get started on but need a program that I can do all of them on. I have some t-shirt designs that I want to put on the computer so I can advertise them and as well I want to make some logos (which goes along with the t-shirt designing). As well I want to edit some photos. Anyone know of a single program, or 2 if it comes down to it, where I can do all of this?

Thanks,
Logan

You don't need to buy anything. Inkscape and gimp.

I downloaded them both. when I opened Gimp it opened with X11, which I have no idea is. But wouldn't let me use it. And when I opened Inkscape it said I needed X11, which i thought I had, but it said for 10.3 but I'm running 10.6, any help?

so i downloaded gimp, and its running, with x11, which i dont know is. But when i open gimp there is a huge window that i cant resize and dont know what to do. Please let me know what i can do.