Edit This gives logged-in users a little pencil icon that is an instant link from your public site to directly edit specific entries, templates, and categories in the control panel, based on the viewing user's permissions.
Entries Number allows you to find the number of entries posted into certain weblogs and/or into certain categories and/or having a certain url_title or entry_id.
Very powerful add-on for building lists of entries and previous/next links.
The External Entries plugin lets you manage any MySQL database table from an ExpressionEngine template. Select, update, insert and delete database rows.
This plugin hides whatever you tell it to hide unless they enter the right turning number ( or captcha ).
Entry Categories allows you to output info about categories the entry was posted into.
Entry ID allows you to find the entry id of the entry or entry ids of several entries which have characteristics specified in parameters.