Beats
Lightweight Data Shippers. Beats is the platform for single-purpose data shippers. They send data from hundreds or thousands of machines and systems to Logstash or Elasticsearch.
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Bosun
Bosun is an open-source, MIT licensed, monitoring and alerting system by Stack Exchange. It has an expressive domain specific language for evaluating alerts and creating detailed notifications. It also lets you test your alerts against history for a faster development experience.
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bugsnag
Monitor everything you're building.
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Datadog
Datadog is a full-stack monitoring service for large-scale cloud environments that aggregates metrics/events from servers, databases, and applications. The SaaS-based data analytics platform helps Dev & Ops teams resolve performance issues, and ensure timely completion of dev/deployment cycles.
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elmah.io
Cloud-based error management/logging for .NET web applications. Find bugs before you go live. Powerful search, API, integration with Slack, GitHub, Visual Studio and more.
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FastForward
Flexible operating-system event and metric forwarding agent. Receives input and forwards output using plugins.
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Instrumental
Instrumental is a real-time, high-scale application and server monitoring tool with intelligent alerts, a powerful query language, and free development accounts.
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KairosDB
KairosDB is a fast distributed scalable time series database written on top of Cassandra. RESTful JSON-based query/results. Includes flot-based visualization.
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Kibana
Kibana is a modern, beautiful visualization tool that works seamlessly with Logstash and ElasticSearch. It features a no-code setup, realtime analytics, and much more.
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Raygun
Raygun keeps a watchful eye on your web and mobile applications and tells you when problems arise.
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Rollbar
Detect, diagnose and defeat errors.
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Sentry
Automate error tracking to find and fix issues before your users even experience a crash. Sentry is open-source, real-time, and loved by 100,000 developers around the world.
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SignalFx
SignalFx is an advanced monitoring and alerting solution for modern infrastructure. With SignalFx, development and operations teams monitor, analyze, and alert in real-time on any time series data.
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Snitch
SaaS SSL monitoring and alerting. Snitch audits for revocation, expiration, changes to the certificate, known security vulnerabilities, and best practices. Snitch worries about your SSL/TLS certificate so you don't have to
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