MIGHTYminnow

Braad

This plugin allows you to create special links that check whether a user is logged in and then follow the link if they are or show an ajax-powered login form in a simple lightbox if they are not. Once the user fills out the login form with valid credentials they will be logged in and redirected to the page the link points to.
<h4>Scenario</h4>
Let’s say you’ve got a page on your site that only logged in users are able to access. It could be a private page or ideally it is a page that is set up to show a standard login form to users who are not logged in. With this plugin you could add the class ‘ajax-login-trigger’ to all the links that point to that page, then when a user clicks one of these links an ajax request is sent to the server to check whether the user is already logged in, and if they are the user is redirected to the page without ever noticing that the login check was done, or if they aren’t logged in they’ll see a login form appear in a simple lightbox. When the user fills out the form, a second ajax request is sent to the server to attempt to log them in, and if successful the user is redirected to the page.
<h4>Customize It!</h4>
This plugin includes lots of hooks and filters that allow for all sorts of customizations and unique use cases. Here’s a quick list:
Actions:
<pre><code>mm_ajax_login_before_form_outside
mm_ajax_login_before_form_inside
mm_ajax_login_extra_buttons
mm_ajax_login_after_form_inside
mm_ajax_login_after_form_outside
</code></pre>
Filters:
<pre><code>mm_ajax_login_trigger_selector
mm_ajax_login_form_title
mm_ajax_login_status_message
mm_ajax_login_username_label
mm_ajax_login_password_label
mm_ajax_login_rememberme_text
mm_ajax_login_lost_password_text
mm_ajax_login_button_text
mm_ajax_login_custom_login_action
mm_ajax_login_email_login_fail_message
mm_ajax_login_success_message
mm_ajax_login_fail_message
mm_ajax_login_allow_email_login
</code></pre>
Many things are possible with these hooks. The hooks <code>mm_ajax_login_before_form_inside</code> and <code>mm_ajax_login_after_form_inside</code> allow you to add any custom input elements to the form. When the login form is submitted all of the values from the input elements included in the form will get passed to the PHP function that processes the ajax request, which will then pass the data to the <code>mm_ajax_login_custom_login_action</code> filter. You can intercept the incoming data using this filter and proceed with any custom action you want, like registering new users and logging them in during the same action.
<h4>Filter Examples</h4>
Use a custom selector for the trigger link:
<pre><code>add_filter( 'mm_ajax_login_trigger_selector', 'prefix_custom_login_trigger' );
function prefix_custom_login_trigger( $selector ) {

 // Custom selector goes here.
 $selector = '.my-custom-selector';

 return $selector;
}
</code></pre>
Use a custom status message:
<pre><code>add_filter( 'mm_ajax_login_status_message', 'prefix_custom_status_message' );
function prefix_custom_status_message( $status_message ) {

 // Custom status message goes here.
 $status_message = 'Magic happening...';

 return $status_message;
}
</code></pre>
This plugin is <a href="https://github.com/MIGHTYminnow/mm-ajax-login" rel="nofollow ugc">on Github</a> and pull requests are always welcome.

Mm Ajax Login

A custom lightbox login form that serves as a gatekeeper for links with the class "ajax-login-trigger".

techotronic

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A Colorbox/Lightbox plugin for WordPress.
jQuery Colorbox features 11 themes from which you can choose. 
Works out-of-the-box with WordPress Galleries and <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Gallery</a>! (choose no effect in NextGEN settings)
When adding an image to a post or page, usually a thumbnail is inserted and linked to the image in original size. 
All images in posts and pages can be displayed in a Lightbox/colorbox when the thumbnail is clicked. 
Images are grouped as galleries when linked in the same post or page. Groups can be displayed in a slideshow within the Lightbox/colorbox.
Individual images can be excluded by adding a special CSS class.
jQuery Colorbox can also open linked content (external as well as inline) in a Lightbox/Colorbox.
For more information visit the <a href="https://wordpress.org/extend/plugins/jquery-colorbox/faq/" rel="ugc">FAQ</a>. 
If you have questions or problems, feel free to write an entry at <a href="https://wordpress.org/tags/jquery-colorbox?forum_id=10" rel="ugc">the jQuery Colorbox WordPress.org forum</a>
Localization
<ul>
<li>Arabic (<code>ar</code>) by <a href="http://www.photokeens.com" rel="nofollow ugc">Modar Soos</a></li>
<li>Belorussian (<code>be_BY</code>) Marcis G.</li>
<li>Bosnian (<code>bs_BA</code>) by Vedran Jurincic</li>
<li>Bulgarian (<code>bg_BG</code>) by <a href="http://nikolay.zaynelov.com" rel="nofollow ugc">Nikolay Zaynelov</a></li>
<li>Czech (<code>cs_CZ</code>) by David Weis</li>
<li>Simplified Chinese (<code>zh_CN</code>) by <a href="http://tech.yiandya.com/" rel="nofollow ugc">Lucas Ho</a></li>
<li>Danish (<code>da_DK</code>) by Michael Bering Petersen</li>
<li>Dutch (<code>nl_NL</code>) by <a href="http://nl.linkedin.com/pub/richard-laak/b/b21/672" rel="nofollow ugc">Richard van Laak</a></li>
<li>English (<code>en_EN</code>) by <a href="http://www.techotronic.de/" rel="nofollow ugc">Arne Franken</a></li>
<li>Finnish (<code>fi</code>) by <a href="http://www.merisaari.com/" rel="nofollow ugc">Lauri Merisaari</a></li>
<li>French (<code>fr_FR</code>) by <a href="http://www.monblogamoua.fr/" rel="nofollow ugc">Pierre Sudarovich</a></li>
<li>German (<code>de_DE</code>) by <a href="http://www.techotronic.de/" rel="nofollow ugc">Arne Franken</a></li>
<li>Hebrew (<code>he_IL</code>) by <a href="http://www.TommyGordon.co.il" rel="nofollow ugc">Tommy Gordon</a></li>
<li>Italian (<code>it_IT</code>) by Marco Chiesi</li>
<li>Latvian (<code>lv</code>) by Uldis Jansons</li>
<li>Malay (<code>ms_MY</code>) by <a href="http://www.inisahaini.com" rel="nofollow ugc">Saha-ini Ahmad Safian</a></li>
<li>Polish (<code>pl_PL</code>) by Kornel Łysikowski</li>
<li>Portuguese (<code>pt_BR</code>) by <a href="http://twitter.com/gervasioantonio" rel="nofollow ugc">Gervásio Antônio</a></li>
<li>Romanian (<code>ro_RO</code>) by Luke Tyler</li>
<li>Russian (<code>ru_RU</code>) by Arkadiy Florinskiy</li>
<li>Slovak (<code>sk_SK</code>) by B. Radenovich</li>
<li>Spanish (<code>es_ES</code>) by Inma P.-Zubizarreta</li>
<li>Swedish (<code>sv_SE</code>) by <a href="http://www.theindiaexperience.se/" rel="nofollow ugc">Christian</a></li>
<li>Turkish (<code>tr_TR</code>) by <a href="http://www.serhatyolacan.com/" rel="nofollow ugc">Serhat Yolaçan</a></li>
<li>Ukrainian (<code>uk</code>) by Jurko Chervony</li>
<li>Vietnamese (<code>vn_VN</code>) by Techfacts</li>
</ul>
Is your native language missing? 
Translating the plugin is easy if you understand english and are fluent in another language. 
I described in the <a href="https://wordpress.org/extend/plugins/jquery-colorbox/faq/" rel="ugc">FAQ</a> how the translation works.
Credits 
Includes <a href="http://jacklmoore.com/colorbox/" rel="nofollow ugc">ColorBox</a> 1.4.33 jQuery plugin from Jack Moore. 
The picture I used for the screenshots was designed by <a href="http://wallpapers.vintage.it/" rel="nofollow ugc">Davide Vicariotto</a>

jQuery Colorbox

This is the best WordPress plugin ever!



Best Plugin EVER!

I rarely install plugins on my client's websites but I do have a couple of "utility" plugins to make my life easier with development. This is one of them.

Have been using this plugin for years now and it is a great solution for any site that needs a colorbox effect.

Thanks for the plugin!

Easy to use and developer friendly.

Adds Colorbox/Lightbox functionality to images, grouped by post or page. Works for WordPress and NextGEN galleries. Comes with different themes.

Mm Ajax Login vs jQuery Colorbox