Reliable Software is the producer of Code Co-op, the server-less version control system for collaborative development. It was developed to fit the needs of small- to medium-sized development groups wanting to connect remote developers without the hassle of a server. With Code Co-op, you collaborate with others using Email, LAN, and VPN. Additional functionality includes automatic change notification, concurrent check-outs, code review with the built-in visual differ, merging and branching.