microkid

This generates meta descriptions for your posts automatically, using the format explained on the Official Google Webmaster Central blog in <a href="http://googlewebmastercentral.blogspot.com/2007/09/improve-snippets-with-meta-description.html" title="Improve Snippets With Meta Descriptions" rel="nofollow ugc">this article</a>. It uses author, post date, categories, number of comments and, when available, tags.
<h3>Compatibility</h3>
Although this plugin is still in BETA it should work with these other plugins:
<ul>
<li>Ultimate Tag Warrior – If you are using WP 2.3+ with native tag support my plugin will use those tags, if you have a lower version and UTW installed it will use those.</li>
<li>All in One SEO Pack – Make sure you switch of the “Autogenerate descriptions” option for this plugin or you will have two meta descriptions in your page, which can’t be good!</li>
<li>TDO Mini Forms – My plugin will grab the author of the article when it’s been submitted through this plugin.</li>
</ul>

Improved Meta Description Snippets

This generates meta descriptions as advised by the Official Google Webmaster Central blog.

<a href="https://www.mxp.tw/" rel="nofollow ugc">Chun</a> 的 WordPress 開發實用外掛整理。
特色功能(Features):
<ul>
<li>作者開發常用外掛列表。</li>
<li>Themeforest 網站外掛主題下載安裝工具（需自行輸入授權碼）。</li>
<li>批次修改內容類型（Post Type）作者的工具。</li>
<li>快速搜尋與安裝外掛的工具。</li>
<li>外掛打包下載的工具</li>
<li>主題打包下載的工具。</li>
<li>查看 <code>wp-config.php</code> 與網站主機檔案相關設定工具。</li>
<li>資料庫打包匯出工具。</li>
<li>網站 <code>wp-content</code> 目錄打包下載工具。</li>
<li>資料庫關鍵字搜尋與取代工具。</li>
<li>資料庫最佳化設定的工具。</li>
</ul>
需求(Requirements):
<blockquote>
需使用最高管理員身分使用。
</blockquote>

一介資男(Mxp.TW) 開發工具箱

頭香

此外掛為 Chun (Mxp.TW) 開發常用外掛整理之批次安裝工具

Improved Meta Description Snippets vs 一介資男(Mxp.TW) 開發工具箱