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English definitions beside usage and collocation references

Word-level grammatical annotation of Quranic Arabic

A beginner's guide to Russian sounds, vocabulary and grammar.

Free English courses with practical life and work topics.

Teacher-led English videos organized by topic and level.

A YAML-based CLI for asserting the installed packages, services, files, ports, and other state of a system.

Turn reusable HTML or visual templates and JSON data into generated PDF documents.

Measure Internet-facing application performance from distributed test locations and trace failures across network dependencies.

A prompt engineering workspace for comparing models and refining AI workflows

Control paid feature access with credits, entitlements and metering

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

Build and deploy full-stack web projects with Git integration and preview environments.

Multichain wallet with tools for inspecting token-spending permissions

Add saved-card checkout to your website or Android app

Write naturally by hand and add PDF pages to notes for markup.

Recruit and manage participants for user research

Automate Czech invoice reminders and payment matching

Lint and format Python projects with one configurable command-line tool.

Run web and mobile application tests on hosted browsers and physical devices without maintaining a device lab.

Check public endpoints and scheduled jobs from external locations, then alert when a problem persists.

Check website and server availability from external locations and alert a team when a test fails.

Track scheduled jobs and heartbeats so missed runs and failed background processes can trigger alerts.

US bill calendars, electronic bills and configurable card controls

Validate Python data against typed models and generate matching JSON Schema.