Nice tool to compress HTML-documents, nice to annoy people who want to look at your site source too because it puts the whole code in a single line!

The Page Creator Series is a project of a big webpage editor. It is a combination of WYSIWYG interface web page editor, and a advanced HTML source code editor.

Nvu (pronounced "N-view") is a WYSIWYG HTML editor for Linux.

Easy HTML Construction Kit includes six separate tools to assist in HTML coding. It has a versatile interactive TABLE maker which allows creation of table cells larger than 1x1 (by handling ROWSPAN and COLSPAN specifications). It also provides an easy way to convert data in text files to lists, tables and full HTML documents, so if you have a document in plaintext form then you can easily convert it to HTML.

Absolute HTML Compressor is an easy-to-use tool that optimizes
HTML files so their size reduces. Compressed pages appear in
the browser without changes. You can specify various options
of the optimization. The program can create backup copies of
the optimized files.