OnlineOrNot onlineornot.com ↗

Open Domains ↗Networking

A free subdomain service backed by Cloudflare DNS.

Downdetector ↗Observability

A site that charts user-reported service problems.

Opik ↗Observability

An open-source platform for evaluating and observing LLM applications and agents.

GitHub Statuses ↗Observability

A third-party page tracking GitHub's historical uptime based on its incident data.

OpenCloud ↗Hosting & SaaS

A self-hosted file sync and collaboration platform.

Microsoft SNDS ↗Networking

Microsoft's Smart Network Data Services portal for registering and monitoring sending IPs.

OneDev Dev tools

A self-hosted Git server with built-in CI/CD and issue tracking.

evemon ↗Observability

A Linux process monitor inspired by Process Explorer, with remote monitoring over SSH.

Downdetector ↗

A site that charts user-reported service problems.

VictoriaMetrics ↗

Open-source time-series database for metrics.

ccusage ↗

A CLI that estimates Claude Code usage costs from local logs.

GitHub Statuses ↗

A third-party page tracking GitHub's historical uptime based on its incident data.

Mac Monitor ↗

A macOS menu bar CPU indicator with a browser-based details UI.

Opik ↗

An open-source platform for evaluating and observing LLM applications and agents.

Perfetto ↗

An open-source system profiling and trace analysis tool.

ThousandEyes Internet Insights ↗

Cisco's public internet outage map built on network telemetry.

evemon ↗

A Linux process monitor inspired by Process Explorer, with remote monitoring over SSH.

iStat Menus ↗

A macOS menu bar app for monitoring system resources.

lnav ↗

A terminal-based log file viewer and analyser.