Thruk 2.28 released
Thruk is a multibackend monitoring webinterface which currently supports Naemon, Nagios, Icinga and Shinken as backend using the Livestatus API. It is designed to be a 'dropin' replacement (for Nagios web UI etc) and covers almost 100% of the original features plus adds additional enhancements for large installations and increased usability. Written in perl.
(I am not a project contributor, just a fan who uses it and has "upgraded" several $clients from Nagios to Thruk+Naemon)