as a HTML editor i recomend some text editors with highlighting (EditPlus2.x suit fine to me: you can configure highlighting for HTML, CSS, C++, PHP, ..., templates for them and so); as ASP editor the best tool i found is Microsoft VisualInterDev (nice codelightng, reasnobile connection to databases and so; sound weird, but it's true) and for PHP i recomend PHPEd - this tool have some kind of PHP compiler, so you can check your page and see if there any errors