Note: Splunk is also available in a limited free version as well as a cloud and enterprise version. For pricing information, please contact a sales representative.
Splunk server indexes logs from any source (apache OS X, sendmail and routers). It is not necessary to set it up for particular formats, create regular expressions, or modify your logging output.
You can search mountains of data by keywords, time, type of event and source. Splunk is server-software. The software can be configured and used via a Web browser.
Note: Now requires OS X 10.9 or later.