That was kind of like Buzz
Picassa was (prior to getting eaten by G+) a great cross platform photo orginizer, with online storage ability.
Buzz integrated with it very well to post photos out of my collections.
Buzz displayed as a folder in gmail, and integrated with Google Chat.
It was fantastic, then G+ came around and there was no picassa, photos were an add on service to G+, except the vast majority of photos I take and orginize are not for social media. Then chat and email and messaging became all confused, which chats go to which sites is ambiguous, and I can't connect with third party services or apps.
It's a shame they finally realize G+ sucks after making so many other services worse when trying to integrate. Even though those services were already nicely integrated into a social network.