Free space: unlimited
Paid plans: no

Brief overview

Instagram one of the most popular social services which allows you to host your photos and short videos in the cloud. It offers mobile application for iOS, Android or Windows Phone devices. You can share your photos to such services as Facebook, Twitter and Flickr and more. Instagram app also allows you to apply different digital filters on your images. Number of photos and videos is unlimited. Max duration of videos is 15 seconds.
It's totally free! Enjoy

Instagram Limits:

Video file: max 15 sec.