Nagios Log Server!

logstash is a tool for managing events and logs. You can use it to collect logs, parse them, and store them for later use (like, for searching). Speaking of searching, logstash comes with a web interface for searching and drilling into all of your logs.

Open Web Analytics - Web Analytics – Open Source Web Analytics Framework

Logmatic.io is an Operations Data Platform for Log and Machine events. We help companies improve their software and business performance by leveraging their machine data.

Graylog is an open source syslog implementation that stores your logs in Elasticsearch. It consists of a server and web interface written in Java that accepts your syslog messages via TCP or UDP (or GELF messages) and stores it in the database.

Fluentd is a fully free and open-source log management tool that simplifies your data collection and storage pipeline. It eliminates the need to maintain a set of ad-hoc scripts.

Grafana provides a powerful and elegant way to create, explore, and share dashboards and data with your team and the world.

Splunk is software that provides unique visibility across your entire IT infrastructure from one place in real time. Only Splunk enables you to search, report, monitor and analyze streaming and historical data from any source. Troubleshoot application problems and investigate security incidents in minutes instead of hours or days, monitor to avoid service degradation or outages, deliver compliance at lower cost and gain new business insights from your IT data.

Hosted log management for servers, apps, and cloud services. Papertrail aggregates syslog, Text log files, Apache, MySQL, cloud hosting, Ruby on Rails, Windows events, Tomcat, Heroku apps, and routers & firewalls.

Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log destinations, syslog/tcp, fine grain output format control, high precision timestamps, queued operations and the ability to filter on any message part. It is quite compatible to stock sysklogd and can be used as a drop-in replacement.

Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Since its inception in 2012, many companies and organizations have adopted Prometheus, and the project has a very active developer and user community. It is now a standalone open source project and maintained independently of any company.

Event Log Explorer is an effective software solution for viewing, monitoring and analyzing events recorded in Security, System, Application and other logs of Microsoft Windows operating systems. Event Log Explorer greatly extends standard Windows Event Viewer monitoring functionality and brings many new features.

Real time, actionable insights into your log analytics data with ELK as a service.

logsniffer is a sophisticated open source web tool for viewing, monitoring and analyzing log data - smarter and easier.It provides an awesome and intuitive web log viewer to keep an eye on all your logs - in one place and in real-time. It was never easier to scroll and search through gigs of logs using simply a web browser.Monitor your infrastructure by sniffing logs for events of your interest. logsniffer provides powerful scan routines and alerting to several channels.Download and run logsniffer on premise. It will take only minutes and keep logs secret. »