Thomas Schulte

This plugin dynamically shows preview screenshots of hyperlinks as tooltips on your WordPress site.
For the tooltip effect a jQuery plugin called “qTip2” is used internally. 
Find more about this great project here: http://qtip2.com/ 
The thumbnails are provided by http://thumbsniper.com and its API.

ThumbSniper

This plugin dynamically shows preview screenshots of hyperlinks as tooltips on your WordPress site.

Link

使用短代码 <code>[wp-openlink]</code> 将链接输出到一个页面，带网站缩略图（备注字段）和点击数（评分字段），不修改数据库也不需要专门存储图片。
缩略图格式说明：长宽为 100px * 70px，保存格式为 Data URI 编码，读写实时，每张占用数据库大小约为 10k。
<ol>
<li>可配置缩略图接口</li>
<li>可自定义链接样式</li>
</ol>
More information: <a href="https://www.xiaomac.com/open-link.html" rel="nofollow ugc">www.xiaomac.com</a>.

Open Link 图链

Use [wp-openlink] to output all your Blogroll in a Page, with website screenshot thumbnail and clicks countable, no database altered or images storage …

ThumbSniper vs Open Link 图链