logsniffer!

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.

BareTail is a real-time log file monitoring tool.

glogg is a multi-platform GUI application to browse and search through long or complex log files. It is designed with programmers and system administrators in mind. glogg can be seen as a graphical, interactive combination of grep and less.

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.

LogExpert is a Windows tail program (a GUI replacement for the Unix tail command). LogExpert is free for non-commercial or commercial use.

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.

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.

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.

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

SnakeTail is a Windows tail application for monitoring text log files. You can also monitor Windows event logs. Multiple window modes are supported (MDI, Tabbed, Floating).