jshoptaw

This plugin allows you to use uploaded CSS files that can be used across themes without having to edit any theme files or use FTP.
For example, if you wanted to use Font Awesome on your site but your current theme doesn’t include it (or you know you want to use Font Awesome regardless of what theme you’re using), you can simply upload the <code>font-awesome.css</code> (or <code>font-awesome.min.css</code>) file using the WordPress Media Uploader then activate said stylesheet in the Theme-Independent Stylesheets (TISS) settings. That CSS file will then automatically be included on your site no matter what theme you’re using. Even if you switch themes, the CSS file will still be called in your site’s <code><head></code> (as long as the theme is coded to properly use <code>wp_head()</code>, which most themes are).

Theme-Independent Stylesheets

Allows for use of uploaded stylesheets (.css files) to be used alongside any theme

Irina_Yurievna

Plugin “Independent Favorite Plugins” adds plugins to favorite list independent of wordpress.org. You can add to favorite and export plugins, which aren’t present on the WordPress website.
Major features in “Independent Favorite Plugins” include:
<ul>
<li>One list of favorite plugins for few websites.</li>
<li>You can add to favorites plugins, which aren’t present on wordpress.org or other websites.</li>
<li>Export list of the favorite plugins, present on the website to zip archive.</li>
<li>Support multisite</li>
<li>Customize the appearance of favorite icon (include using splitters).</li>
<li>Supprot languages: en, ru.</li>
</ul>
PS: At present time this plugin doesn’t synchronize list of favorite plugins with wordpress.org or envatoMarket. 
For one list for few single websites the plugin works only with ftp.
Plugin demo pages:
http://demo.flowering-garden.com/demo1/wp-admin
http://demo.flowering-garden.com/demo2/wp-admin
login/password: demo/demo
Plugin page: http://demo.flowering-garden.com
Author’s upwork profile: http://www.upwork.com/fl/irinagracheva
<h3>Requirements</h3>
You need wordpress version at least 3.1. The work for other version is possible, but not guaranteed. 
PHP version at least 5.4. 
For export to zip archive your php server put support zip archivation. 
For using remote list of favorites plugins you need ftp account and PHP server which support FTP. 
FTP server must support passive mode.
Most hostings support this requirements.

Independent Favorite Plugins

Add plugins to favorite list independent of wordpress.org or other websites

Theme-Independent Stylesheets vs Independent Favorite Plugins