LingoEducation

With Lingo, you are never stopped by words you don’t know again. While you 
are browsing online, you can double-click on words you don’t know. Lingo 
will show you the meanings, sounds, and importance of the words. It’s a 
quick and easy way to build up your vocabulary and make reading fun!
Built on natural language processing technology, Lingo prompts users to 
learn new words and saves those to a word collection to be reviewed down the 
road. They can practice their words with automatically generated flashcards 
and quizzes.
<a href="http://lingoeducation.com/demo?utm_source=wordpress&utm_medium=plugin&utm_campaign=widgetplugin" rel="nofollow ugc">Try it here</a>.

Lingo Web Dictionary

Lingo Education turns every Web session into a chance to learn a language.

ThimPress

LearnPress is a <a href="http://thimpress.com/learnpress" rel="nofollow ugc">WordPress LMS Plugin</a> by ThimPress.
LearnPress Course Review bring review feature to your course. Now, student can rate and give review for the course they take on a LearnPress site.
Review add-on for LearnPress is using on some WordPress Themes: <a href="http://themeforest.net/item/education-wordpress-theme-education-wp/14058034?utm_source=wporg&utm_medium=course-review&ref=thimpress&utm_campaign=learnpress" title="Education WordPress Theme" rel="nofollow ugc">Education WordPress Theme</a> and <a href="http://themeforest.net/item/lms-wordpress-theme-elearning-wp/11797847??utm_source=wporg&utm_medium=course-review&ref=thimpress&utm_campaign=learnpress" title="LMS WordPress Theme" rel="nofollow ugc">LMS WordPress Theme</a>, more is coming.
Other free add-ons for LearnPress are available in WordPress:
<ul>
<li><a href="https://wordpress.org/plugins/learnpress-wishlist/" rel="ugc">LearnPress Wishlist</a> – add courses to a wishlist for students.</li>
<li><a href="https://wordpress.org/plugins/learnpress-course-review/" rel="ugc">LearnPress Course Review</a> – review course for enrolled students.</li>
<li><a href="https://wordpress.org/plugins/learnpress-import-export/" rel="ugc">LearnPress Import Export</a> – export or import course or courses out-of-box.</li>
<li><a href="https://wordpress.org/plugins/learnpress-prerequisites-courses/" rel="ugc">LearnPress Prerequisites Courses</a> – require student to pass some courses in order to enroll other course.</li>
<li><a href="https://wordpress.org/plugins/learnpress-bbpress" rel="ugc">LearnPress bbPress</a> – add bbPress Forum support for LearnPress.</li>
<li><a href="https://wordpress.org/plugins/learnpress-buddypress" rel="ugc">LearnPress BuddyPress</a> – add BuddyPress support for LearnPress.</li>
</ul>
Premium Plugins (add-ons) for LearnPress WordPress LMS Plugin
<ul>
<li><a href="http://thimpress.com/shop/certificates-add-on-for-learnpress/" rel="nofollow ugc">Certificates add-on for LearnPress</a> – adding drag & drop certificates builder as well as selecting designed certificate for each LMS course, your student will get particular certificate when they finished a course.</li>
<li><a href="http://thimpress.com/shop/co-instructors-add-on-for-learnpress/" rel="nofollow ugc">Co-instructors add-on for LearnPress</a> – multiple instructors support for each LMS course.</li>
<li><a href="http://thimpress.com/shop/collections-add-on-for-learnpress/" rel="nofollow ugc">Collections add-on for LearnPress</a> – making LMS courses collection by selecting number of courses, this is helpful if you want to combine multiple LMS courses into a collection for a group of skills.</li>
<li><a href="http://thimpress.com/shop/stripe-add-on-for-learnpress/" rel="nofollow ugc">Stripe Payment method for LearnPress</a> – Stripe payment method for LearnPress WordPress LMS Plugin.</li>
<li><a href="http://thimpress.com/shop/woocommerce-add-on-for-learnpress/" rel="nofollow ugc">WooCommerce add-on for LearnPress</a> – using WooCommerce as payment gateway for LearnPrss WordPress LMS Plugin.</li>
</ul>
<h3>Other note</h3>
<a href="http://docs.thimpress.com/learnpress" rel="nofollow ugc">Documentation</a> is available in ThimPress site. 
<a href="https://github.com/LearnPress/LearnPress/" rel="nofollow ugc">LearnPress github repo.</a>

LearnPress – Course Review

They just don't bother to reply the support questions. Use it on your own risk

No support

LearnPress Course Review - An extension plugin for LearnPress.

Lingo Web Dictionary vs LearnPress – Course Review