Current downloads

Check_MK Raw Edition (CRE)
1.2.8 (old-stable): 1.2.8p26
1.4.0 (stable): 1.4.0p15

Check_MK Enterprise Edition (CEE)
1.2.8 (old-stable): 1.2.8p26
1.4.0 (stable): 1.4.0p15

Enterprise Edition - Demo Version
1.2.8 (old-stable): 1.2.8p26
1.4.0 (stable): 1.4.0p15

Check_MK Managed Service Edition (CME)
1.4.0 (stable): 1.4.0p15

For more information and other versions please visit the download page.

Interview

Nagios' chief developer Ethan Galstad interviews Mathias Kettner on Check_MK. Read the full interview here.