I've been working on a web app called Artwork Inbox. It's basically a way to view the new submissions and posts of people you follow in bulk, and without having to do a lot of clicking or scrolling (similar to FurAffinity's notifications page, if you're familiar with that). I plan on adding Tumblr support soon.

It's still a work in progress - there might be occasional server errors, and the server will probably go down sometimes because I'm not paying much to keep it up. But I figured I'd share it with you all.

https://artworkinbox.azurewebsites.net/