Evenfy - A free tool to manage household IOUs with roommates, split bills and track group expenses so that everyone gets paid back. On the web, iPhone, and Android.
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!
Splid - Splid helps friends manage their money.
Tricount - Manage and share expenses with friends
Kittysplit - The easiest way of sharing costs with a group of friends
Nextcloud Cospend - The Nextcloud App Store - Upload your apps and install new apps onto your Nextcloud