Uladzimir Kulesh

UK Portfolio is a WordPress plugin that adds a custom post type “Project”. By having custom post types in a separate plugin, your content remains intact across different themes. It also registers separate project taxonomies for tags and categories.
This plugin doesn’t change how projects are displayed in your theme. You will need to add the some templates if you want to customize the display of projects.

UK Portfolio

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.

UK Portfolio vs Multiple Portfolios