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Data systems and end-to-end data work

PC-component reviews and technical investigations

Illustrated technical-interview courses

Engineering careers through technical people's stories

Data integration, quality, and analytics for AI-ready data

A browser-based Elixir notebook for executable code and Markdown, with interactive results and collaboration.

Notebook-based symbolic and numerical computation

Explore SQL-connected data with charts, dashboards and a SQL workspace.

Keyword research, backlink analysis and site audits, with free owner tools

Run configurable pricing, risk and valuation-adjustment studies

Cross-reference crawls, server logs and Google data for large-site SEO.

Research stocks with interactive charts, fundamentals and IBD ratings

Inspect supplied server logs to understand which URLs search and AI bots actually requested.

Prioritized crawl findings with explanations, maps and audit comparisons.

Inspect a page's metadata, headings, links, schema and response behavior from a browser extension.

Combine page audits, keyword tracking and content recommendations in one SEO workspace.

Crawling, monitoring and release checks for website optimization teams.

Specify institutional crypto data by venue, detail and usage rights

Automate marketing reports in Google Sheets and Data Studio

AI data analyst for spreadsheets and reports

Fully managed cloud platform for data engineering, analytics, and AI

Convert AsciiDoc source into HTML and other publishing formats with the Ruby-based reference implementation.

Keep rich-text or code notes in a hierarchical tree stored in a single database or file collection.

A portable C library and reference for loading and rendering fonts.