MetacatUI

I have decided to go with fancybox which an display images, video, HTML, and external webpages if we need to. It can display the images gallery style with Prev/Next buttons and thumbnails at the bottom for browsing. It also is designed to handle long captions well unlike some other lightbox libraries where I would need to mess with the CSS a bit to allow long captions to display underneath the images.

http://fancyapps.com/fancybox/

Additional notes on fancybox:

- I've tested it in multiple browsers, including the dreaded IE 8, and it works fine and looks nice
- According to builtwith.com reports, fancyBox is the most-used lightbox Javascript library and usage is increasing - https://trends.builtwith.com/javascript/lightbox
- A short list of websites that use fancyBox, according to builtwith.com:

Domain           Quantcast          Alexa    
    stylestories.ebay.com    3    21    
    aws.amazon.com/*    6    9    
    microsoft.com    10    37    
    seatme.yelp.com    12    131    
    wm6.walmart.com/*    35    202    
    consultants-locator.apple.com    51    47    
    homedelivery.nydailynews.com    55    429    
    stores.bestbuy.com/*    68    388    
    about.att.com/*    69    456    
    racing.ups.com    89    248    
    corp.bankofamerica.com    97    162    
    upware.comcast.com/*    99    929    
    advertising.gawker.com    101    633    
    activities.local.com    102    2081    
    kohls.com    112    957    
    h20386.www2.hp.com/*    120    299    
    homedepot.com    125    448    
    engineering.zillow.com    142    199    
    grindtv.com    177    3075    
    filmon.com

- Github: https://github.com/fancyapps/fancyBox/issues?state=open