Magnus - Shazam for art
Splitwise - Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!
Masterworks - Invest in the world’s most valuable paintings.
SplittyPie - Create event, add users and their expenses.
Artsy - A global platform for discovering and collecting art.
Kittysplit - The easiest way of sharing costs with a group of friends