Prometheus: Prometheus is an open-source monitoring tool for collecting and analyzing metrics from various systems and services. It uses a pull-based model to gather data, allowing it to scale well and support a wide range of use cases. Prometheus provides a flexible query language for analyzing data and has a large ecosystem of integrations with various systems and services.

Grafana: Grafana is a popular open-source platform for visualizing and analyzing metrics data. It integrates with many different data sources, including Prometheus, and provides many dashboards, alerts, and other visualization tools. Grafana also has a large community of users and contributors, making it easy to find support and plugins.

Splunk: Splunk is a widespread monitoring and data analysis tool for analyzing machine-generated data, including logs, metrics, and events. It provides powerful search and visualization capabilities and supports various data sources, including applications, servers, and networks.

Datadog: Datadog is a cloud-based monitoring tool for tracking various metrics, including infrastructure, applications, logs, and user experience. It provides a unified view of all your data, real-time alerts, and integration with various tools and services.

New Relic: New Relic is a popular SaaS-based application monitoring tool for monitoring the performance and health of applications in production. It provides real-time data on various metrics such as response time, error rate, and throughput, and alerting and collaboration tools to help teams respond quickly to issues. 

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