Proportional Font Terminal is a version of Ajaxterm hacked to use Web-optimized proportional fonts. This allows terminal users to have the same kind of proportional fonts that have all but displaced monospace fonts for mainstream Web use because they offer simply better usability.
ajax-cross-browser-using-iframes uses Iframes, an empty div, and innerHTML, allowing you to create AJAX calls. It is a little bit confusing at first, but once you understand it and place the necessary nested PHP files, it will allow you to create unimaginable things. It is cross-browser.