Proxmox Mail Gateway - Protect mail server against spam, viruses and malware with Proxmox Mail Gateway security for businesses, government, education and non-profit organizations.
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!
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Splittable - Shared living made simple
Rspamd - Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...
EquiTable - Split the bill fairly