JSpell is a server-based spell checker that allows you to spell check any HTML input field and form. It is i18n compliant and has dialogs for multiple languages available. It can be used to add spell checking capabilities to HTML forms on your Web site. This spell checker is compatible with JSP, ASP, CGI, PHP, Cold Fusion, Oracle Forms, etc.
SynchroEdit is a browser-based document editor for use by multiple users simultaneously. It is a form of same-time, different-place groupware. It allows multiple users to edit a single web-based document at the same time, and it continuously synchronizes all changes so that users always have the same version.
Richie Rich is an HTML document editor that runs within a Web browser. Unlike other in-line HTML editors, this operates straight on the DOM to avoid incongruities between what is visible in the front end and the HTML that is created in the back end. It supports undo, mouse selection, cursor positioning, and creation of headings, paragraphs, lists, links, bold, italic, and underline.