"Postfwd plugin for blocking international spam botnets based on geographical location of IP addresses used to login to postfix via sasl." (ib.) Actually, this plugin locks out logins to compromised accounts once it counts too many logins from too many countries.
"Tahoe-LAFS is a Free and Open decentralized cloud storage system. It distributes your data across multiple servers. Even if some of the servers fail or are taken over by an attacker, the entire file store continues to function correctly, preserving your privacy and security."