e1tekoap42

this highlighter has the following features:
<ul>
<li>works in frontend by using javascript ,so it has almost no pressure on the server side</li>
<li>support cache plugin</li>
<li>support UTF-8,GBK and GB2312 encoding search engine (eg:google.com,baidu.com)</li>
</ul>

Search engine keywords highlighter

highlight the keywords if visitor is from search engine

haoqis

Add baidu Tracker JavaScript to each page on your wordpress blog.
此插件将百度统计代码安装到wordpress，支持宽松的格式校验，保证安装代码格式正确， 简单易上手，可设置开启和关闭统计、管理页面跟踪。

Baidu Tongji generator

Add Baidu tongji JavaScript to each page on your wordpress blog.

Search engine keywords highlighter vs Baidu Tongji generator