rioloft

Upon plugin activation, an “Add to your list” link with a star is automatically added at the end of each post and page.
Clicking this link will pop-out a list on the bottom right of the screen, and add the current post or page to the list.
This list is saved via HTML5 storage to the browser so it will be available also in the future to the user.
You can allow all users, or only logged users to perform some actions:
<ol>
<li>Sharing of the list via Facebook.</li>
<li>One-click iPhone-ready Content download of the selected posts in the user list as a simple Web app, 
ready for offline browsing via mobile devices</li>
<li>Sharing of the list via email.</li>
</ol>
You can see a working demo here: 
http://www.rioloft.com/rio-guide/

My Posts List with Offline Browsing

Let users build a list of their favorite posts/pages from the site and share their list on Facebook, via E-Mail, or  download content as a Web-app for …

Ramoonus

This plugin adds the Modernizr to your WordPress installation. 
Modernizr is a small JavaScript library that detects the availability of native implementations for next-generation web technologies, i.e. features that stem from the HTML5 and CSS3 specifications. Many of these features are already implemented in at least one major browser (most of them in two or more), and what Modernizr does is, very simply, tell you whether the current browser has this feature natively implemented or not.
For documentation visit http://www.modernizr.com/docs/

Modernizr for WordPress

The 2.8.4 version inserts broken javascript link. I posted a message about this in the support section for the plugin and the author has not responded or fixed the problem. Now, any site that I've added this plugin to can be broken if the user runs an update. 

Instead, if you need Modernizr, insert the following into your header.php file just after <?php wp_head(); ?>:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.3/modernizr.min.js"></script>

Doesn't work - Plugin Defunct

This plugin adds the Modernizr to your WordPress installation.

My Posts List with Offline Browsing vs Modernizr for WordPress