New in version 1.2:
<ul>
<li>all changes only for WordPress MU (WPMU)</li>
<li>no changes for normal (single) WordPress</li>
<li>full WordPress MU (WPMU) support</li>
<li>runs on WPMU as an autoactivated plugin</li>
<li>the right place for installation is in wp-content/mu-plugins</li>
<li>activate/deactivate auto tag suggestion is only a site wide option</li>
<li>only site admin(s) can activate/deactivate auto tag suggestion</li>
</ul>
Features of version 1.1 are:
<ul>
<li>Show all your tags in alphabetically order as buttons on every post page</li>
<li>also tags with ‘ and ” in names are supported</li>
<li>To choose a tag, only a simple click on it is needed</li>
<li>All assigned tags are listed in alphabetically order. If you add or remove one or more tags, the tags will be automatically reordered for you</li>
<li>An administrator-option to switching off the auto-tag-complete (also called auto tag suggestion) on the whole WordPress-Blog</li>
<li>Full multi-language support. Translated languages are in the moment: English, German.</li>
</ul>
A complete description with some screenshots you can find on <a href="http://www.im-web-gefunden.de/wordpress-plugins/iwg-faster-tagging/" title="IWG Faster Tagging's Home" rel="nofollow ugc">Plugin Homepage at “im web gefunden”</a>.

IWG Faster Tagging

"IWG Faster Tagging" fixes some disadvantages from the original tagging-system at your editing post page..

freekrai

With the YQL Auto Tagger plugin, you’ll never have to think of tags for your posts again. The plugin uses the Yahoo Query Language to perform semantic analysis of your post text and suggest tags for you. Add them to your post with just a click.
This plugin requires PHP 5 and the cURL library (both of which are available on most web hosts).
Based on the Open Calais Auto Tagger by Dan Grossman – http://www.dangrossman.info

YQL Auto Tagger

The plugin performs an analysis of your post text and suggests tags for you.

IWG Faster Tagging vs YQL Auto Tagger