I use PHP Designer (http://www.mpsoftware.dk/downloads.php). Dont' let the name throw you, it's not just a PHP page builder. It's got TONS of useful features (such as a library that has documentation...

All the above options are quite good, except for one thing: they cost money.

Of course, you could always download a cracked version of Dreamweaver, but if you wanna keep it legal, I recommend...