Mitch

The most lightweight WordPress solution for quick maintenances. This plugin adds a maintenance option to your settings menu.
Features:
<ul>
<li>The admin bar maintenance button will become red to indicate that you have maintenance mode enabled so you’ll never forget to turn it off</li>
<li>Customize your own page – after that, you will be able to set it as your maintenance page</li>
<li>Administrators will still have access to the front-end of the website while the website is under maintenance</li>
<li>Lightweight, healthy code and very compact: that’s what makes this plugin so awesome!</li>
<li>Auto Disable (optional); Automatically turn off maintenance mode at the chosen date: you can also put the <code>easy-maintenance</code> shortcode in one of your pages to display the Auto Disable date to your visitors</li>
<li>Support for Genesis Framework and Contact Form 7: You are able to add a contact form to your maintenance page</li>
<li>This plugin will automatically use the style of your theme</li>
</ul>
No premium versions, no advertisements or hidden credits. This plugin will always stay lightweight and there won’t be any unnecessary code and/or features added.
I appreciate your review!

Easy Maintenance

The most lightweight WordPress solution for quick maintenances.

Bjørn Johansen

This is a WordPressified version of the excellent, lightweight (for real!) imageLightbox.js (MIT-licensed) by Osvaldas Valutis (http://osvaldas.info/image-lightbox-responsive-touch-friendly)
This is his introduction to the lightbox: 
“As for the image lightboxes, I have always lacked simplicity for them. I mean not only the visual design, but the overall experience: from implementation to UX. All due respect, but I have never liked any of these light-fancy-face-boxes. They all were solving problems that just don’t exist: lots of unwanted features by default, total mess in markup, no native behavior for touch screens. I was working on a project and needed an image lightbox that solves these problems. I needed a lightbox only for images, not video, text, and iframes at once. I made ImageLightbox.js.”
This version autodetects all links to image files and opens them in the lightbox.
For your “install, activate and go”-convenience, this plugin comes with a minimal CSS that easily can be deactivated and/or replaced.
The plugin can also be themed to your liking. An example theme is available here: https://github.com/bjornjohansen/imagelightbox-theme-smooth
Please let me know if you have any issues. Fastest way to get a response is by Twitter: https://twitter.com/bjornjohansen

imageLightbox

Image Lightbox, Responsive and Touch‑friendly.

Easy Maintenance vs imageLightbox