CssMatic has 4 very useful tools for every web developer.
Gradient Generator helps to create stunning gradient backgrounds for your wedpage.
Border radius creates rounded corners and borders for divs.
Noise texture lets you create stackable noise backgrounds
Box shadow (my favorite) very handy tool that helps with creating box shadows for you item
Use MenuMakers to easily build clean, responsive website navigations. From this site you can find wide range of stylized menus to use on you website. Styling the menus can be done from the site, but in order to download styled menu you have to upgrade to Online user whits costs $19/year. For skilled developer styling the menu from downloaded css shoud not be too hard.