I agree with zelo here. From what I am aware of there is a decent graphics tool for Linux called
GIMP (GNU Image Manipulation Program. It has versions for all three -- Windows, Linux, MacOS-X. Now THAT is impressive! Now For "Web Site Editors", here is where Linux falls a bit short. We all wish our favorites like Dreamweaver and FrontPage would just port over a version for Linux users, but for now there are only some less familiar options. Linux of course has great text editors (Pico, Vi, Nano) for doing those raw edits, but for real dynamic development there is just Composer (yes the old Netscape Communicator component. Then there is Sun's
Star Office (OpenOffice) which has an HTML editor built in but it falls short in many ways. So is there any possible saviour here for Web Dev on Linux? Some say maybe the future is in
Screem, which is very advanced but does not provide a WYSIWYG interface. For my money, there is nothing like the dualing screen (HTML and WYSIWYG at the same time) to get that must-look-good-and-be-done-yesterday type stuff done!