fyljp

本插件用于记录搜索引擎的抓取时间及抓取链接。目前支持搜索引擎：百度、谷歌、360、神马、有道、搜狗、必应、Alexa、Yandex、WordPress，以及其他表示中包含Spider关键字的抓取蜘蛛。
This plugin can record where and when the Search Engine visited. Easy but useful.It can recognize the Search Engine of Baidu,Google,Bing,Yandex,Alexa,WordPress,360,Sm,Youdao,sogou.

SpiderDisplay

本插件用于记录搜索引擎的抓取时间及抓取链接。目前支持搜索引擎：百度、谷歌、360、神马、有道、搜狗、必应、Alexa、Yandex、WordPress，以及其他表示中包含Spider关键字的抓取蜘蛛。

buntegiraffe

Hide Email Address allows you to make email addresses on your site invisible to web spiders and crawlers. 
It also makes it still possible to easily copy and paste email addresses.
Please feel free to post your questions in the support threads of this plugin, we will be glad to help you with any issues.
PRO Version: 
Automatically protects all email addresses on your site, for only 4.95 eur with Hide Email Address PRO (http://bunte-giraffe.de “http://bunte-giraffe.de”).
<blockquote>
<h4>Main features</h4>
<ul>
<li>Hide email addresses from bots</li>
<li>Hide single-line sensitive content from bots</li>
<li>Protected content is generated as image </li>
<li>Protected content is turned into text on click (for real visitors to copy)</li>
<li>Protected content uses the styles of your posts/pages/widgets </li>
<li>Automaticaly protects all emails on your site (PRO version)</li>
<li>Regular updates</li>
<li>Great support</li>
</ul>
</blockquote>

Hide Email Address

Looks good so far

Protect email address from being collected by web crawlers.

SpiderDisplay vs Hide Email Address