We all need an editor to edit HTML, javascript or PHP. Of course that is possible in Notepad, but these tools really bring something extra.
Notepad ++ is a widely used editor for HTML, PHP, etc.
Coffeecup is a professional HTML editor that also provides a free version.
Nertbeans is a Java-based HTML and PHP development environment from the Apache Foundation.
Visual Studio Code is a free code editor from Microsoft.
Komodo edit is an open source editor.
Bluegriffon is a cross platform web and EPUB editor.
PSPad is a free HTMP, PHP editor for windoes.
With this Dutch WYSIWYG html editor you can build your own static website without code.
Quick 'n Easy Web Builder is an HTML design tool and web builder for Linux and MacOS