Flickr is a community based photo sharing site that allows you to upload photos, connect to your friends photos, join special interest groups, tag photos, comment, and much more.

Why Flicker Rocks:

• When you upload a photo, it generates 5 sizes of the photo which can then be used in various ways (blogs, emails etc)
• Flickr contains multiple ways to organize your photos, from sets, to tagging, to collections.  All of these organizational methods can be exploited by third party applications that use that information to create unique slideshows among other things.
• Flick allows users to grab the high res version of photos.  This makes photo sharing for non-profits both easier internally and externally.
• Flickr uses tags, which can be used as a method for pooling photos (ex: you tell everyone at an event to tag their photo with a unique tag like, "blaheventmay2007" or something like that, and then if you search under that tag, all the photos will show up.  In addition, many external flickr apps can parse flickr images through unique tags.
• Flickr allows the option for a Creative Commons licenses or a copyright.
• Create 1 off photo albums that are printed like a book from your photos in flickr.  You can use this feature to make a small number of booklets about your nonprofit if you wanted to get really creative. Click here to see other things you can do with your photos.
• Buy prints.
• Add comments.
• You can create a flickr group for your nonprofit, which members can join and then feed photos to - thus creating a member generated content source
• Because flickr has an open API, many usefull applications have been built on top of it that can be used on your website.
  •  http://flickrbadge.theducky.com/
  • http://mentalaxis.com/words/flickr-tools