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Structural calculators with free tools and paid design checks

Diagnose IPv4, IPv6 and dual-stack browser reachability

Check TLS protocols and ciphers from the command line

Automate TLS configuration checks across services

Review a sample email's authentication and spam signals

PDF preflight and correction through profiles and process plans

AI writing assistance for grammar, clarity, tone, and text generation.

Monitor ICMP or TCP responses from several hosts

Send ICMP probes to many hosts from one program

Check spelling and inspect word forms from a terminal

Grammar checker and AI writing app for browsers, Office and mobile.

Monitor application, database, server, and web-transaction health from one managed console.

Security checks and guided privacy settings for everyday browsing

Check reachability and responses from several remote locations

A command-line tool for sending HTTP requests and asserting the responses as repeatable tests.

A Java testing library that starts disposable Dockerized dependencies for integration tests.

Find unusual ledger transactions and organize the follow-up investigation

Audit engagements, working papers and financial reporting in connected tools

Describe mobile and web UI journeys as YAML flows and run them on a real or virtual target.

Run repository builds, tests, and release steps in workflows defined by CircleCI configuration.

Run gray-box end-to-end tests against React Native apps on iOS and Android.

Bitcoin signing firmware for supported K210 devices

Deploy applications, databases, and services to servers you control.

Design, send, test and mock API requests from a desktop workspace with local, Git or cloud storage options.