60 free, open-source GitHub repos — every pick from all six parts of the series — that replace the paid software running most businesses: email, VPN, HR + payroll, feature flags, analytics, backends, identity, ERP, e-commerce. With the repo, the bill it kills, and the exact command to deploy each.

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Every repo from all six parts of the series in one field guide. The 10 newest picks go after the bills everyone thinks have no alternative — Firecrawl replaces paid scraping APIs, Postiz replaces Buffer and Hootsuite, Huly replaces Linear + Slack + Notion at once, NetBird replaces Tailscale, Stalwart replaces Google Workspace email, LanguageTool replaces Grammarly, Rybbit replaces Plausible + Hotjar, solidtime replaces Toggl, Frappe HR replaces BambooHR, and GrowthBook replaces LaunchDarkly + Optimizely — each with the exact deploy command. Plus reference tables of the other 50 from Parts 1-5, a weekend self-host checklist (VPS, Docker, HTTPS, backups, one tool at a time), and the honest when-NOT-to-self-host note. Together these replace over $470,000/yr of software at team scale (Parts 3-6 alone), for the cost of a few servers.

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