With this plugin, you will be able to display an index with all your tags, sort alphabeticaly.
Stylish Indexes for your WordPress Blog. Create alphabetical indexes of your posts, with headings, subheadings, and descriptions, based on post title,
Sphider search indexing integrated with WordPress.
A plugin which looks for <IMG> tags in the excerpt and, if found, wraps them with a link to the post permalink.
Displays a list of the posts from one or more categories in virtually any way you want.