The ISODE software was initially a public domain / open source implementation, led by Marshall Rose.
Following version 6.0, Marshall handed the lead over to Colin Robbins and Julian Onions, who coordinated the 7.0 and 8.0 releases.
ISODE had a full X.500 and LDAP directory called QUIPU[7] (incorrectly pronounced kwip-ooo by the project).
QUIPU was designed by Kille and the lead engineer was Robbins, largely funded by the INCA project,[8] and used extensively in the Paradise academic X.500 directory pilot.
ISODE has a full implementation of a PKI Certificate Authority built on top of it by the OSISEC[11][12] project.