Top MONITOR GitHub Repositories & Tools (2026)

The only tool you need to know what is happening and how to fix it.

Watcher - Open Source AI-powered Cyber Threat Intelligence & Hunting Platform. Developed with Django & React JS.

Lightweight, self-contained Linux® server monitoring tool

Web-app for processing, logging and visualising energy, temperature and other environmental data

Percona Monitoring and Management: an open source database monitoring, observability and management tool

Threat-hunting tool for Linux

Sentry SDK for Ruby

The Istio proxy components.

Synthetic monitoring engine with Playwright and Prometheus metrics

Versus Incident is the self-hosted AI SRE agent. It learns what your system normally look like and escalates only what is new or unexpected issues — routing to your chat channels and on-call platform.

Silent Crypto Miner is an advanced cryptocurrency mining builder and runtime engine with multi-algorithm CPU/GPU support and intelligent resource management. Create custom mining executables with configurable algorithms, cross-platform output, real-time monitoring, session persistence, thermal throttling, scheduling, and hashrate optimization.

Monitor all your Claude/Codex usage limits in real-time from your macOS menu bar - supports 5-hour, 7-day, extra usage, 7-day Opus and 7-day Sonnet quotas.

Sentry SDK for .NET

Track AI API quotas across Synthetic, Z.ai, Anthropic (Claude Code), Codex, GitHub Copilot & Antigravity in real time. Lightweight background daemon (<50MB RAM), SQLite storage, Material Design 3 dashboard. Zero telemetry.

Signal 18 repman - Replication Manager for MySQL / MariaDB / Percona Server

ApplicationInsights-dotnet

Native macOS app to monitor AI usage limits and watch your coding sessions live

Error tracking and logging from Javascript to Rollbar

Free, open-source SQL Server and Postgres performance monitoring. Collectors, real-time alerts, graphical plan viewer, MCP server for AI analysis. Supports SQL 2016-2025, Azure SQL, AWS RDS, Postgres, Aurora Postgres.

Exception tracking and logging from Ruby to Rollbar