Ruven

This plugin registers a custom post type for portfolio items and a taxonomy for portfolio types.
Selected themes by Ruven provide templates to display portfolio items. 
In other themes you most likely have to add them by yourself.

Ruven Themes: Portfolio

RT Portfolio enables a "Portfolio" post type and "Type" taxonomy.

Sajedeh Gooklani

Mahdi Yazdani

MyPreview

Registers a custom post type along with tags and categories for portfolio projects.
Translators & Non-English Speakers
Translators are welcome to contribute to the plugin. Please use the <a href="https://translate.wordpress.org/projects/wp-plugins/pofio" title="WordPress translation website" rel="nofollow ugc">WordPress translation website</a>.
Support this plugin
Don’t forget to rate this plugin <a href="https://wordpress.org/support/plugin/pofio/reviews/" title="5 shining stars">5 shining stars</a> if you like it, thanks!
<h3>Credits</h3>
<ul>
<li><a href="https://wordpress.org/plugins/jetpack/">Jetpack by WordPress.com</a></li>
<li><a href="https://wordpress.org/plugins/featured-galleries/">Featured Galleries</a></li>
</ul>

Pofio

Registers a custom post type along with tags and categories for portfolio projects.

Ruven Themes: Portfolio vs Pofio