Now it happened to Nagios: Users and parts of the original development team have formed a forge of the original code. The new project is named
ICINGA (ugh, all caps) Icinga.
Now, why the fork. That’s what the people behind the fork say:
(…)to ensure above all, the continuous development of this popular monitoring software, a group of active, long standing Nagios community supporters have resolved to fork Nagios and open its development to a broader base. This team currently consists of members of the previous Nagios community advisory board, developers of numerous Nagios extensions and NETWAYS, the organiser of the Nagios Conference and provider of the NagiosExchange platform.