on windows:
Microsoft Web Expression 4.0 is available for HTML/CSS.
there are extensions like code cola for chrome. Chrome's inspector tool is awesome too. you can also use Firebug in FireFox.
For jQuery, there are extensions for Google Chrome. with or without documentation. like jquery shell. jquery browser. For CSS there are extensions like code cola.
though you will need web-server for extensions in chrome to work. like IIS. create a virtual directory in IIS for that.