Amit Badkas

Calendar Archives is a visualization plugin for your WordPress site which creates yearly calendar for your posts. Create a new page (having ‘no sidebars’ template) for your calendar archive and insert the shortcode [calendar-archive] in the editor. Load this page and enjoy the view!
Each day of calendar will display first available photo from posts of that day in the background. The plugin’s layout is customizable and having two working layouts for demonstration
For more details, see http://www.sanisoft.com/blog/2009/08/21/wordpress-plugin-calendar-archives/

Calendar Archives

Calendar Archives is a visualization plugin for your WordPress site which creates yearly calendar for your posts.

robfelty

Create collapsible archives by year or month. Features include: link to archive pages, display of individual posts and support for custom post-types.
<h3>Demo</h3>
I use this plugin in my blog at http://blog.robfelty.com

Collapsing Archives

Very helpfull

This plugin uses Javascript to dynamically expand or collapse the set of months for each year and posts for each month in the archive listing of your  …

Calendar Archives vs Collapsing Archives