This is a widget that brings up a little preview of a site into the sidebar. If you want to use this in a widget-less / static sidebar, give <a href="https://wordpress.org/extend/plugins/blogintroduction-wordpress-plugin/" title="blogintroduction-wordpress-plugin">blogintroduction-wordpress-plugin</a> a chance. The link is chosen by random out of the links in the WordPress link-manager. You can specify a single link-category or use all categories for the random-link-base.
You can also decide to show invisible/private links. This is for the case you want to show links as a preview you don’t want to show in the linkroll.
If you want and if there is a description for the link done in the link-description-field it would be shown.
A refreshing via AJAX could be enabled with a specific time (in seconds) when the next thumbnail would be loaded.
This widget uses the <a href="http://www.websnapr.com/" title="Website Thumbnais For Your Site" rel="nofollow ugc">websnapr</a>-Service for generating the thumbnail-images. Keep their <a href="http://www.websnapr.com/terms/" title="General Terms and Conditions for Websnapr" rel="nofollow ugc">term of use</a> in mind. You should get an API-Key for free from there to use this widget and get more then 80 snapshots per hour, with key it would be about 340 per hour (250.000 a month).
Since Version 0.3.0 you could also use the image-link stored in the link-manager for containing the link to the preview-image. If no link is given the widget would use websnapr as fall back.
If you want to translate the plugin, feel free to do it! Since Version 0.2.0 the Output is fully internationalized.
To see the widget working in a production-environment, visit the <a href="http://blog.huebel-online.de/" title="Blog of Kim Huebel" rel="nofollow ugc">author’s blog</a>.
If you want to leave a feedback, feel free to do this on the <a href="http://blog.huebel-online.de/blogintroduction-wordpress-widget/" title="Home of blogintroduction-wordpress-widget - Blog of Kim Huebel" rel="nofollow ugc">plugin’s homepage</a> of the author’s blog. Though the pages are in german, comments in english are wellcome, too.

blogintroduction

Shows a thumbnail of a blogroll/linkroll-entry by random

KrishaWeb

Dilip Bheda

Pratik Gandhi

Harsh Patel

Admin Tour helps you create guided tours inside your WordPress admin area. It’s perfect for non-technical users who find the dashboard confusing or forget how things work after a while.
With Admin Tour, you can walk users through every important section like Posts, Pages, Media, Users, Categories, and more using simple tooltips and highlights. Even if you already gave them a full demo once, this plugin ensures they can always find their way around the admin panel without your help.
Developers can also extend it easily using built in hooks and filters to add custom steps or tours for specific screens.
<h3>Features</h3>
• Simple setup, No coding needed 
• Default tours for Posts, Pages, Media, Users, Settings and Categories 
• Multi-lingual support 
• Free updates and support
<h3>Checkout the advanced features of Admin Tour Pro:</h3>
• Ready made tours for Dokan vendor users. 
• Dashboard widget for vendor tours. 
• Compatible with WooCommerce. 
• Easily customizable.
<a href="https://store.krishaweb.com/product/admin-tour-pro/" rel="nofollow ugc">Checkout the Admin Tour Pro</a>

Admin Tour

The plugin is so important. The development team is amazing. I reported an issue and they released an update within 24 hours. 

A very important plugin | Great Team

Admin Tour helps you to create a tour for admin. Admin user can go through the tour and they will get the knowledge about how to use the admin panel.

blogintroduction vs Admin Tour