20 repositories for getting found everywhere.

Automated audits for performance, accessibility, SEO, and web best practices.

Why it made the list: It is the baseline audit engine behind much of the modern web performance ecosystem.

A large agent skill suite covering technical SEO, content, schema, GEO, AEO, links, local search, and reporting.

Why it made the list: Its adoption is unusually fast, and the workflow coverage spans the full visibility lifecycle.

Watch: Several advanced workflows depend on third-party APIs and data providers.

Reusable Next.js components for JSON-LD and search-friendly metadata patterns.

Why it made the list: It remains a strong reference for typed, reusable JSON-LD across modern Next.js sites.

Watch: Use the native Next.js Metadata API for ordinary page metadata in current App Router projects.

A self-hostable SEO suite for keywords, rankings, backlinks, audits, and AI brand visibility.

Why it made the list: It combines traditional SEO and AI visibility in one of the fastest-growing projects in the category.

Watch: Live research relies on paid DataForSEO usage, even when the application is self-hosted.

The home of Open Knowledge Format, a Markdown and YAML frontmatter standard for trusted, agent-readable knowledge.

Why it made the list: OKF formalizes freshness, verification, sources, lifecycle, and graph links for knowledge used by agents.

Watch: OKF is a knowledge interchange format, not a confirmed search ranking factor.

An agent workspace for SERP research, topic clusters, content briefs, optimization, internal links, and publishing.

Why it made the list: It turns content strategy into a visible, repeatable research and publishing workflow.

Watch: It is a Claude-oriented workspace, not a drop-in content library.

The canonical Schema.org vocabulary and the software that supports it.

Why it made the list: Every serious structured-data system should begin with the source vocabulary, not a secondhand checklist.

Real-browser performance testing with Core Web Vitals, video, HAR data, and scheduled monitoring.

Why it made the list: It goes beyond one-off scores and supports repeatable performance diagnostics across environments.

A site-wide crawler that runs Lighthouse across discovered pages in parallel.

Why it made the list: It closes the gap between a single page score and a usable audit of an entire website.

Generates sitemaps and robots files for static, dynamic, server-rendered, image, video, and multilingual Next.js pages.

Why it made the list: It is a focused solution for making complex Next.js route inventories discoverable to crawlers.

A local CMS inside VS Code for managing Markdown, frontmatter schemas, taxonomies, media, and publishing.

Why it made the list: It treats frontmatter as an operational content model instead of a loose collection of optional fields.

The original proposal and tooling for giving language models a concise, Markdown-first map of a website.

Why it made the list: It is the primary source for understanding and implementing the emerging llms.txt proposal.

Watch: Adoption is growing, but there is no evidence that the file guarantees rankings or citations.

The open WordPress SEO platform for metadata, schema, sitemaps, canonicals, breadcrumbs, and content analysis.

Why it made the list: Years of production use make it a valuable reference for CMS-level SEO architecture and edge cases.

TypeScript types for the full Schema.org vocabulary and type-safe JSON-LD.

Why it made the list: It catches malformed entity and property combinations before they ship.

A self-hosted SERP API for multiple search engines, answer boxes, related queries, page extraction, and automation.

Why it made the list: Its normalized provider model is useful for research workflows that cannot depend on one search engine.

Watch: Live scraping can require proxies and ongoing maintenance as result pages change.

A desktop SEO crawler with JavaScript rendering, link maps, metadata extraction, issue detection, and exports.

Why it made the list: It is one of the clearest open alternatives to subscription-based technical SEO crawlers.

A CLI, Python, MCP, and CI toolkit for AEO and GEO audits, citability checks, crawler rules, schema, and citation tracking.

Why it made the list: It has the deepest technical surface among the open AEO and GEO audit toolkits reviewed.

Watch: Some readiness checks are heuristics and should not be presented as measured citation outcomes.

A local-first dashboard for brand mentions, citations, competitors, AEO audits, and prompt tracking across six AI surfaces.

Why it made the list: Its product surface connects technical readiness with actual prompt and citation monitoring.

Watch: Deeper collection relies on paid Bright Data, OpenRouter, and Gemini usage.

A self-hosted AEO and GEO platform for prompt tracking, mentions, citations, brand descriptions, and competitors.

Why it made the list: Its commit history and operational scope are unusually mature for such a young category.

Watch: Self-hosting still requires infrastructure and provider integrations.

A developer-first AI visibility scanner with 36 checks, CI support, a GitHub App, and plugins for 13 frameworks.

Why it made the list: Eleven stars hide more than 500 commits, hundreds of tests, and unusually broad framework coverage.

Watch: Its score measures technical readiness, not proof that an answer engine cites the site.