Dreamweaver is a decent html/css editor.
In case you advance to php pages or a sql database, xampp is a good testing environment. Very little feature restrictions there, so don't use it as a hosting server for security reasons.
By the time i use what my friend adviced - the Notepad++. It's very simple and fast, without any lags or smth like that, but the thing i miss there is the list of possible things you can write, which appears nearby while u type. This can also avoid syntax errors (which notepad++ doesn't show) and make the process faster...
But i will also check the Dreamweaver to see what it can offer me. That will take some time till i advence to php or sql. Next week i'm home half of the time, we have an independence day, so i will take a look.
Can you tell me a bit of how do i insert some flash animation in my page?
PS. I've just seen i can resize this window you type your message in. That's awesome!