The first is a lot like the built-in SimpleEdit under MacOS or WordPad under Windows. Still, you probably want to download a fancier editor if you are doing web development. You can also get some other Linux-land editors like joe if you want. But if you want to go in a more BeOS-oriented direction, you have a number of choices also. Eddie is a nice freeware programmers editor with most of the enhancements you expect in a programmers editors.
PE is a genuinely full-featured text editor.
HTML is quite well supported by a template insertion button bar. InSite Designer is a visual HTML editor, in the style of HomeSite, PageMill, or Netscape Composer. It has no frame support, unfortunately. Neither of these is quite the latest language versions, but hopefully those will be done soon also. Also of interest to web developers is the availability of PHP 4.04.