Vladimir Prelovac

WP Nofollow Categories is a SEO plugin which adds nofollow attribute to all category links throughout the blog. It will also add noindex tag to category page and nofollow author links. This will effectively remove the category pages from SEO point of view.
The goal is to flow the page rank to other pages on your site like posts and tags while avoiding duplicate content issue.
Plugin by <a href="http://www.prelovac.com/vladimir" rel="nofollow ugc">Vladimir Prelovac</a>.
<h3>Credits</h3>
Thanks to <a href="http://kempwire.com/" rel="nofollow ugc">Jonathan Kemp</a> whose <a href="https://wordpress.org/extend/plugins/nofollow-categories/" rel="ugc">plugin</a> inspired me
<h3>License</h3>
This file is part of WP Nofollow Categories.
WP Nofollow Categories is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
WP Nofollow Categories is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with WP Nofollow Categories. If not, see <a href="http://www.gnu.org/licenses/" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.

WP Nofollow Categories

Nofollows category links across the site. Adds Noindex to category pages.

Andrew Ozz

Excerpt Editor provides a convenient place for creating and editing all excerpts. It can also add custom excerpts for pages (not possible without a plugin). Features: auto-creating excerpts when publishing new Posts and Pages, displaying customisable excerpts from the content for posts without an excerpt, appending excerpts from the latest posts to each Post or from the sub-pages to each Page, replacing the content for all archive and tags pages with excerpts (eliminates content duplication for SEO).
The excerpts can be used in the RSS feed, displayed on the Home or Archive pages and/or used for meta descriptions. The excerpts can be in any language supported by WordPress and the plugin contains .pot file to facilitate translations.

Excerpt Editor

Quick edit or create excerpts for both Posts and Pages, auto-generate and append excerpts or replace the content with excerpts.

WP Nofollow Categories vs Excerpt Editor