Um, for me that would be the following:
DreamWeaver MX for html, css, php and such
Photoshop 7.0 for static graphics, ImageReady for animated GIFs.
Flash MX for occasional work with Flash.
EasyThumbnails for makiking thumbs and resizing images in batch.
SmartFTP for uploads to server.
TheBat! for email communication.
IE Explorer and Netscape 7.1 for web browsing and cehcking compatibility.
Oh, and i run Apache web server on my computer, so that i dont need to upload anything to server to see if it works
<<<EDIT>>>
Forgot to say - i use ACD See v2.3 (very old one, but best of them, imho) to browse files, see images, copy-paste, and batch rename.