Photo-centric social network, is there an engine?

Question

CMS

Greetings!
We need an engine that will allow us to implement something like the following:
- The user registers and receives a blog / profile.
- The user uploads photos, they are displayed in the general feed on the main page and in the user's profile (blog);
- Ability to reblog photos of other users;
- Ability to create galleries, photo collections;
- Ability to subscribe to the user;
- Groups / communities and subscription to them.
I understand that I'm asking a lot, but first I want to exclude the possibility of developing a new bike, if a similar solution exists.
Thank you for attention.

Answer 1

You just created Tumblr.
Look towards InstantCMS (1.x).

Answer 2

Alto/LiveStreet has photoset post type, community blog creation, community group