Gimp 2.8 has a very slick text tool
I had a sentence that I wanted in 3 different fonts, 3 colors, and with different sizes for some of the words. I wasn't looking forward to it.
But this video made it easy.
For some reason it doesn't look like I can embed the video, so I just put the link in. I'll try a post on this topic too, and see if the advanced posting will let me do that.
Edit: Great, the embed happens automatically now.