DaganLev

huntlyc

Simple, easy to use, fancybox style popup.
Works for all images in your page that are in anchor tags. If it finds more than one, it will create a small gallery you can navigate through with the buttons or your keyboard. Advanced users can open iframes and html content in it fairly easily.
<h4>Avanced users</h4>
<h4>Basic use</h4>
Anchor class for popup: “hs-rsp-popup”
<h4>Advanced use</h4>
<ul>
<li>disable gallery feature and popup for image by adding this class: no-hsrsp-popup</li>
<li>anchor classes for iframe popup “hs-rsp-popup iframe”</li>
<li>anchor classes for html popup “hs-rsp-popup hiddendiv”</li>
</ul>
<h4>Examples</h4>
To popup an image give the anchor tag around the image this class: “hs-rsp-popup” 
Example: <code><a href="image.png" class="hs-rsp-popup"><img src="image.png" alt="image"/></a></code>
For an iframe, set the srct of the iframe and use the class “iframe” combined with “hs-rsp-popup”: 
 <a href="http://www.youtube.com/watch?hl=en-GB&v=2WNrx2jq184&gl=GB" title="Bird is the word" rel="nofollow ugc">Watch this</a>
You can also use this to show html content. For local content just use the id of the element for the href: 
 <a href="#elementid" rel="nofollow ugc">click here</a> 
 Hello, World!
For remote content, link to the page, for example: 
 <a href="http://www.hotscot.net" rel="nofollow ugc">click here</a>
<h4>Setting Popup Size (image/iframe)</h4>
You can use the following html5 data attributes in your link to set the size: <code>data-popupheight="100" data-popupwidth="300"</code> These values are in pixels.
For Example: 
 <a href="image.png" rel="nofollow ugc"></a>
Note: for this to work, you have to use both the data-popupwidth and data-popupheight attributes.

Really Simple Popup

Simple, easy to use, fancybox style popup

w3dev

Seamlessly integrates the fancyBox 3 script into your WordPress installation: Upload, activate, and you’re done. Additional configuration is optional.
You can easily customize almost anything you can think about fancyBox lightbox. By default, the plugin will use jQuery to apply fancyBox to ANY thumbnails that link directly to an image. It will also automatically convert WordPress image galleries into fancyBox galleries.
For Inline content linking 
– Create a link to any hidden or visible div with an ID attribate, and the plugin will transform the link and enable it for fancyBox usage. 
– Note: this may cause a conflict if your page or website is using a smooth scrolling function to jump between page sections!
In upcoming versions, additional functionality for ajax calls and iframe data will be implemented.

fancyBox 3 for WordPress

Seamlessly integrates the fancyBox 3 script into your WordPress installation: Upload, activate, and you're done. Additional configuration is opti …

Really Simple Popup vs fancyBox 3 for WordPress