Kiran Potphode

View large images up close using simple mouse interaction, and the full screen.
Add full-screen-image class to image. The one mandatory attribute is either a src, data-image or a href, which needs to point to an image file. You can use data-image if you want to load in a different version of the image to the original source (higher resolution, for example).
You can also pass through titles, and subcaptions, which will appear at the bottom right of the viewer. To do this, you use the data-title and data-caption attributes.
This plugin is based on Intense Image Viewer javascript liabrary by Tim Holman

Full Screen Images

Viewing images on the full screen. Using the touch/mouse position for panning.

Toni

This plugin enables you to display a Fullscreen Button on your site. The plugin can easy implement with a shortcode. 7 different Versions from the Fullscreen Button are current available.
<h3>Usage</h3>
Integrate the Shortcode in WordPress and you get the following Unicode Symobol ⛶ with the Full Screen Function. Full customize, for changing the size or color. The ⛶ Unicode Symbol works with the standard HTML text formats.
Update: Now with Support for Font Awesome. With a special Shortcode you get the Font Awesome Expand Icon for Fullscreen Mode.
Shortcodes:
Fullscreen Button (Unicode Symbol ⛶) [fullscreen_button] 
Fullscreen Button (Unicode Symbol 🡥) [fullscreen_button_2] 
Fullscreen Button (Unicode Symbol ↕) [fullscreen_button_3] 
Fullscreen Button (Font Awesome) [fullscreen_button_fa] 
Fullscreen Button (SVG Alternate) [fullscreen_button_a1] 
Fullscreen Button (Text Version) [fullscreen_button_text] 
Fullscreen Button (Switch Toggle) [fullscreen_toggle]

Fullscreen-Button

Fullscreen Button Plugin, with a stylable Unicode Symbol for your WordPress.

Full Screen Images vs Fullscreen-Button