EyeEm (free) is a photo sharing app with a focus on local pictures.
We Heart It
We Heart It (free) is a social platform for sharing photos, gifs, and videos. Favorites can be stored in groups for things like meal ideas or travel plans.
FotoSwipe (free) is an app for sharing photos directly across platforms.
Trover (free) is a travel-oriented and location based photo sharing app.
Snapr (free) is a location based photo sharing app.
Path (free) is an app for sharing anything with a close group of friends.