Drupal core comes with two input formats: Filtered HTML and Full HTML. Filtered HTML format lets both authenticated and anonymous users enter comments and contents safely by limiting the allowed HTML tags to a very limited set with the HTML Filter. Full HTML is indented for admin use only because it allows any HTML tags and attributes to be used. WYSIWYG editors make use of many more tags and attributes to satisfy the full range of format options. Since the HTML Filter is only capable of allow or dis-allow of HTML tags, it is inadequate for complete safety because Wysiwyg editors make use of a large range of HTML tags and attributes. But for safty from XSS and other attacks, HTML tags and and attributes must be very precisely controlled so the Wysiwyg editor can safely render full range of styling format. The Wysiwyg Filter precisely satisfy this need: it lets you specify exactly what tags and what attributes are allowed in such a way that gives you the full rang of HTML tags and attributes required by the Wysiwyg editors and yet keeping the format completely safe. It's a replacement of the built-in HTML Filter.

CCK is all about variable data the user enter. This module let you insert static content from another node into the CCK edit form and output. See my article about this module here to get more info.

This module turns Drupal's pager into a text box where you can enter the page to go directly to. It's very useful if you have many many page and need to go to any page very quickly.