samsonw

Grid Archives offers a grid style archives page for WordPress, just put “[grid_archives]” in your Post or Page to show the grid-style archives.
The default config will display all posts in every categories. To display posts under one specific category, input [grid_archives category=”Category name”] instead.
View <a href="http://blog.samsonis.me/archives" rel="nofollow ugc">live demo</a>
For latest update, please check github repository: 
http://github.com/samsonw/wp-grid-archives

Grid Archives

Grid Archives offers a grid style archives page for WordPress.

jonkemp

texttheater

Improves your blog’s search engine optimization by “noindexing” pages you choose.
Add the <code>noindex</code> robots meta tag to archives, categories, search pages, tags, author pages, login, admin pages or any other page you choose.
Add the <code>rel="nofollow"</code> attribute to individual pages listed by the <code>wp_list_pages</code> function or the Pages widget. Also, add the <code>rel="nofollow"</code> attribute to archive links, category links, registration and login links.
Written by Jon Kemp, currently maintained by Kilian Evang.
<h3>Usage</h3>
After installation, the settings page for this plugin can be found in your WordPress administration interface under Settings → Ultimate noindex.

Ultimate Noindex Nofollow Tool II

Improves your blog's search engine optimization by "noindexing" pages you choose. Now also for page-based (as opposed to date-based) archives.

Grid Archives vs Ultimate Noindex Nofollow Tool II