Free Grid plugin for WordPress called Advance Portfolio Grid

This plugin will add a responsive portfolio grid in your WordPress site. Highly customizable. Option for choosing custom post type for portfolio.
Advance Portfolio Grid
Plugin Features:
Responsive Portfolio Grid.
Portfolio column settings. 2/3/4 column portfolio.
Custom post type & custom taxonomy choosing option. You can choose your own custom post type or taxonomy instate of our default portfolio post type & taxonomy.
Taxonomy exclude feature. You can exclude specific category portfolio to show.
Portfolio image popup.
Portfolio image thumbnail size settings.
Flat and responsive Design for portfolio.
Shortcode System
Advance setting panel.
All modern browser support.
Very Lightweight & many More

Source: WordPress › Advance Portfolio Grid « WordPress Plugins