Quema Labs

With this plugin you can create as many portfolios as you want. This means that you can have multiple portfolios with multiple items each. It also registers taxonomies for tags and categories for each portfolio.
This plugin doesn’t change how portfolio items are displayed in your theme. You’ll need to add templates for archive-portfolio.php and single-portfolio.php if you want to customize the display of portfolio items.
It is based on the plugin Portfolio Post Types by Devin Price and Gary Jones but extended to allow multiple portfolios.

Multiple Portfolios

With this plugin you can create as many portfolios as you want. This means that you can have multiple portfolios with multiple items each.

Bobby Gunawan

A plugin which adds portfolio custom post type for WordPress themes <a href="https://made4wp.com" rel="nofollow ugc">by Made4WP</a>.
This plugin adds a custom post type “portfolio” and other portfolio related backend features like taxonomies and meta boxes.
This plugin DOES NOT add any front end display. You will need to add/edit your own “single-portfolio.php”, “archive-portfolio.php” or make a custom query for the post type “portfolio” to display the portfolio items.
Although this plugin is meant to be used with Made4WP themes, please feel free to use it for your own themes as well.
** UPDATE NOTICE ** 
The taxonomy “type” has been changed to “category”. If you had any portfolio items using the type taxonomy, you will need to recreate and switch them to use categories instead.

M4WP Portfolio

A Made4WP plugin. This plugin adds the custom post type "Portfolio" and it's related features such as taxonomies or meta boxes.

Multiple Portfolios vs M4WP Portfolio