The latest version of Zabbix can be downloaded from Softpedia
Zabbix 2.2.1, an enterprise-class open source distributed monitoring solution, released under the GPL (free of charge for both commercial and non-commercial use), is now out and ready for download.The Zabbix monitoring solution has been separated into multiple branches, and the most recent iteration is the latest stable one, featuring quite a few changes.
According to the changelog, the housekeeping settings have been changed in order to allow overriding item-level history and to trend storage period, the example directory size user parameter has been modified in order to return bytes, and the support for UCD-SNMP has been dropped.
Also, the remote command execution from Zabbix server is now working correctly, if flexible user parameters have been configured.
A complete list of changes can be found in the official changelog. Download Zabbix 2.2.1 right now from Softpedia.