The Seahorse app allows users to create photo and video albums in collaboration with their friends and family.
With Seahorse, anyone can add a photo or video to an album, which are referred to as "scenes." While the collaborative nature -- it's fun to share the wealth -- is a unique component, the true innovation lies in how the app handles the contributions once they are shared. For up to a week, anyone can delete photos, regardless of who initially uploaded them. This unorthodox concept is meant to establish a sense of co-ownership between those involved. Offering shared control allows a de-emphasis from who took the photo, allowing the subjects to have a communal archival experience.
Another cool feature is the Flashback, a discovery function that recalls photos from today's date in previous years.