yii2-mpdf :

The yii2-mpdf extension is a Yii2 wrapper component for the mPDF library with enhancements.

The mPDF library offers ability to generate PDF files from UTF-8 encoded HTML. This library is based on FPDF and HTML2FPDF, with a number of enhancements. The key features in the library are to be able to generate PDF files 'on-the-fly' from HTML content, handling different languages. See the list of features and/or examples for the library. The yii2-mpdf extension offers an easy way to integrate and use the mPDF library within your Yii application with subtle enhancements.

URL : yii2-mpdf

yiimaker/yii2-social-share :

Extension for sharing on social networks

With this extension you can share data from your web pages to any social network! Features: SEO support, default icons for social networks, easy creation of custom drivers for other social networks and more!

Extension supports from the box next social network drivers:

• Vkontakte
• Facebook
• Twitter
• +Google
• LinkedIn
• Pinterest
• Tumblr
• Odnoklassniki
• Trello

Drivers for messengers:

• Telegram
• Viber
• WhatsApp

and other drivers:

• Gmail
• Yahoo

URL : yii2-social-share

yii2-user :

Yii2 User module

Just another user module and component. I've adopted some of the features of other user modules and added more advanced features.

• Optional self registration via front end
• Lost password retrieval(optional)
• User administration interface
• Flexible access control
• Console commnads
• Advanced user (optional)

URL : Yii2 User module