Code Co-op is the peer-to-peer revision control system made by Reliable Software.

Code Co-op is a distributed revision control system of the replicated type.

The exchange of scripts may proceed using different transports, including e-mail (support for SMTP and POP3, integration with MAPI clients, Gmail) and LAN.

Code Co-op has a built-in peer-to-peer wiki system, which can be used to integrate documentation with a software project.

Reliable Software needed a collaboration tool that would work between the United States and Poland.