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Real-time error alerts, performance insights, and anomaly detection across your full stack. Free 30-day trial.
Move from alert to fix before users notice. AppSignal monitors errors, performance bottlenecks, host health, and uptime—all from one dashboard. Instant notifications on deployments, anomaly triggers for memory spikes or error surges, and seamless log management. Works out of the box with Rails, Django, Express, Phoenix, Next.js, and dozens more. Starts at $23/month with no hidden fees.
TADNS is small, portable asynchronous DNS lookup library written in ANSI C. Works on Windows and UNIX. Extremely simple and clean API. The source code resides in single .c file.
IncrediBL is a project that aims to provide a respected and accountable DNSBL service for various communication systems like IRC and e-mail. The code is primarily used by the IncrediBL service itself, but it can also be used to create a separate DNSBL.
C# DNS Client Library (100% managed code). Query domains to get MX records, CNAME and Address resource records from your application. All common DNS query types supported. Supports user-defined servers.
This project is an extension of the OpenSRS client code distributed by Tucows. Many additional features and enhancements have been added, making it easier to configure, extend and implement.