Kiwi Syslog Server - Kiwi Syslog Server prvides solution to centralize and simplify log message management across network devices and servers.
S3stat - S3stat is a service that takes the detailed server access logs provided by Amazon's CloudFront and Simple Storage Service (S3), and translates them into human readable statistics, reports and graphs.
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
Qloudstat - Analytics & monitoring for access logs in Amazon S3, Amazon CloudFront, Google Cloud Storage and Rackspace CloudFiles (Akamai CDN)
Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.
Checkmk - Checkmk - the software for effective IT monitoring