Apps to Error logging

PHP Server Monitor is an open-source, self-hosted tool for monitoring server and website availability and performance. It provides essential monitoring features, including uptime checks, website status, and various service monitoring, all from a centralized web interface.

Monit is an open-source utility for managing and monitoring Unix and Linux systems. It automatically monitors processes, files, directories, devices, and services, providing proactive recovery and alerts.

Cacti is a comprehensive network graphing and monitoring solution built upon the power of RRDTool. It provides a flexible and scalable platform for collecting, storing, and visualizing time-series data, making it an essential tool for network administrators to gain insights into performance and identify potential issues.

Graylog is a powerful, open-source, centralized log management platform designed for collecting, indexing, and analyzing log data from various sources. It helps organizations gain operational visibility, identify security threats, and troubleshoot issues efficiently.

Open Web Analytics (OWA) is a discontinued open-source web analytics platform designed to provide detailed insights into website traffic and user behavior. Offering real-time data, visitor recording, and various monitoring capabilities, it aimed to be a privacy-conscious alternative to commercial analytics solutions.

Fluentd is an open-source data collector that provides a unified logging layer, enabling you to collect, parse, transform, and output logs from various sources to multiple destinations. It is written in Ruby and highly pluggable.

Pandora FMS offers comprehensive monitoring for networks, servers, applications, and cloud environments within an enterprise context. It provides a flexible and scalable platform for IT operations teams to ensure business continuity and optimize performance through detailed insights, alerts, and reporting.

Zabbix is a robust enterprise-class open-source solution for real-time monitoring of millions of metrics collected from tens of thousands of servers, virtual machines, and network devices. It provides a highly flexible and scalable platform for comprehensive IT infrastructure monitoring.

Munin is a free and open-source networked resource monitoring tool designed to help users analyze resource trends and identify performance bottlenecks. It offers a simple yet powerful way to visualize the health of servers, applications, and network devices over time.