Web design

For webmasters, I recommend HTML-Kit. It's just like NotePad -- the best coding program there is :) -- only easier to look at and with handy tools.

I also recommend PHP, which is probably the handiest coding language ever.

w3schools for learning any type of web language imaginable [and a very handy CSS2 reference page].

Music

Metallica. That's all there is to say.

Also Winamp.

Art

openCanvas1.1 - probably the best free raster program there is. [if someone knows a working link to a safe oC download page, please e-mail it to me]

Inkscape - a free vector program.

Browser