Recently I have been investigating different chat modules available in Drupal 7. Adding this capability to your site makes it easy for users to interact with one another encouraging more traffic towards your site.
WYSIWYG editors, those buttons on a web form that look like a word processor's interface, are very popular with people editing content on the web, and for very good reasons. For one thing, they allow you to add text styling when editing a page.
I had another request to alter the default taxonomy_term_data table and adding the timestamps; created and changed just like in the node database table.