Web resources that I find helpful. I've included some Mac friendly programs as well.
HTML/CSS/Coding
Lissa Explains: Useful HTML help site
Dynamic Drive: CSS and Javascript library
Site
Screen Resolution: Test your Website's appearance in different screen resolutions
Browser Shots: Test your Website's browser compatibility
FTP/Editor software
Smultron: Great HTML editor for Apple computers
Taco Edit: HTML editing software for Apple computers
Cyberduck: Freeware ftp client for Apple computers
Fonts + brushes
Fontalicious
daFont
Abstract fonts
Hosting
Photobucket
Imgur: Free image hosting site. No sign-up needed
tinyPic: Free image hosting site. No sign-up needed
000webhost: Free ad-free webhost with PHP, MySQL, FTP, cPanel