Fancybox - fancyapps.com - Fancy App Store
Travel Diaries - Create your own travel diary to capture your experiences
PhotoSwipe - JavaScript gallery, no dependencies.
Magpie - Female travelers club - meet women like you when you travel
Magnific Popup - The greater part of Lightbox modules will completely preload a picture before showing it.
tripcake - Doodle for travel plans with friends