Ready to be published? LXer is read by around 350,000 individuals each month, and is an excellent place for you to publish your ideas, thoughts, reviews, complaints, etc. Do you have something to say to the Linux community?
GIMP is my image editor/creator of choice on both Windows and Linux however I prefer Photoshop on Mac. If you have any experience of Photoshop you will know how to use these tools, brushes and effects in it.