flickr Online Photo Application is certainly one of the best online photo management and sharing applications. You will have your own page to show off your photos.       People can leave comments on every photo and can add notes and tags.

You can form Private Groups for events

• Private groups are useful for families or groups of friends like ETWINNING
  
• Only group members and those who have been invited will be able to view the group page.
• Private groups are completely hidden from group searches

You can form Public Groups for interest groups.

• Invite-only public groups are useful for small groups who wish to focus on a particular theme, but want to maintain control over membership.
• Anyone can view the group page, but the only way to join the group is by invitation.

You can form Public Groups for public interest

• Public groups are useful for discussion and photos of general subjects.
• The group page is public and anyone who wants to can join instantly.

Using Flickr Organizr, you are able to create sets, which are sort of like albums.
www.flickr.com