6. WPtouch WPtouch
Mobile Suite for WordPress WPtouch offers a mobile suite for WordPress that gives your website the powerful features and capabilities that responsive themes simply cannot match. If you want to create a mobile version of your website, then WPtouch is your answer. It has built-in support for eCommerce, mobile-advertising, custom content, and most importantly it allows you offer an app for your site without the App Store.
7. Compact Archives
Compact Archives By default WordPress creates a long bulleted list of your monthly archives. If you have been blogging for a while, adding monthly archives would make users scroll a lot. Compact Archives solves this problem by displaying your monthly archives in a compact block.
ThirstyAffiliates If you want to make affiliate marketing one of the main source of income for your site, then you need an affiliate link management tool. ThirstyAffiliates is the best affiliate link management tool for WordPress. It allows you to easily add affiliate links, cloak links, auto insert on certain keywords, and even export your links. See our guide on how to add affiliate links in WordPress with ThirstyAffiliates.
9. Display Widget
Display Widgets Sometimes you need to display or hide a widget on certain pages. Display Widgets allows you to easily show or hide widgets on selected pages and posts. You can even show widgets only to logged in users and hide for everyone else.
10. WP Mail SMTP
Due to configuration settings on some WordPress hosting providers, your WordPress emails may not get delivered. To solve this problem you would need WP Mail SMTP plugin. It allows you to use an SMTP server to send your WordPress emails instead of PHP’s mail() function. You can even use Gmail’s SMTP server to send your WordPress emails
I hope it helped ..you can share more great plugins like this in this forum