logstash - logstash is a tool for managing events and logs.
DataDog Log Management - DataDog Log Management is a trusted and nimble software that is surfacing the log analysis with complete visualizations and prediction.
rsyslog - Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log...
LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
GoAccess - Open source real-time web log analyzer and interactive viewer that runs in a terminal in *nix...