No need to reload your page, simply add this bookmarklet to your browser toolbar and you can see your CSS changes instantly without full page reload.
Compress Images for the Web
Image Optim is a drag and drop beauty! Simply drag your images to the open dialog box and Image Optim compresses your .jpeg, .gif, .png for web use.
Visual Event visually highlights the elements on a page that have JS events associated with them. This is good for debugging