fancyBox
This is a demonstration. More information and examples: www.fancyapps.com/fancybox/
This example combines fancyBox and Bootstrap. The source code for this forked version of the fancyBox demo can be found at https://github.com/lossius/fancyBoxWithBootstrap.
Simple image gallery
Different effects
Various types
fancyBox will try to guess content type from href attribute but you can specify it directly by adding classname (fancybox.image, fancybox.iframe, etc).
Ajax example will not run from your local computer and requires a server to run.
Button helper
Thumbnail helper
Media helper
Will not run from your local computer, requires a server to run.
Open manually
Photo Credit: Instagrammer @whitjohns