refer.is is a link shortening service for creating short and branded links, generating QR codes and tracking click analytics by location, browser and referrer. It offers custom domains, a browser extension and a REST API for creating and managing links. A free tier includes 1,000 tracked clicks and unlimited redirects per month.
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Resend is an email platform for developers. It provides an interface for sending transactional and marketing emails, with SDKs for programming languages. Features include modular webhooks for delivery, open, bounce and click notifications, a test mode, contact management, broadcast analytics, and email development using React.
Respona is a link building service that places brand mentions on publisher sites and an affiliate recruitment platform for finding affiliate partners and automating outreach. Placements are ordered as done-for-you and priced per placement.
RethinkDNS is a private DNS resolver with custom rules, blocklists and analytics, and RethinkDNS + Firewall is a companion Android app. Features include an Android firewall that blocks apps from connecting to the Internet, DNS-layer content blocking of ads and trackers, and anti-censorship through encrypted DNS requests. It is free and open source.
A PHP package providing a fluent builder for all Schema.org types and their properties. Its classes are generated from Schema.org's JSON-LD standards file, and types can be converted to arrays, rendered to scripts, or encoded as JSON. Installation is via composer.
SearchAttention helps plan, write, optimize, or analyze content for SEO and search visibility.
SearchSocket helps plan, write, optimize, or analyze content for SEO and search visibility.
Semrush's Keyword Magic Tool helps research keywords, search demand, related terms, and content opportunities for SEO.
SEO Minion tracks rankings, SERP visibility, and keyword performance across search results.
SEO PowerSuite helps analyze backlinks, find link opportunities, and support SEO outreach workflows.
SEO Review Tools helps plan, write, optimize, or analyze content for SEO and search visibility.
SEO Search Simulator tracks rankings, SERP visibility, and keyword performance across search results.
SEO Utils is an SEO desktop application for macOS, Windows and Linux. It covers traditional SEO, local SEO and AI search optimization, with tools for tracking rankings across Google, Bing, ChatGPT, AI Overviews and AI Mode, LLM rank tracking, log file analysis, an MCP server, NLP text analysis and an embedding database.
seo-audit-skill crawls websites to audit SEO, accessibility, performance, and technical page issues.
seo-audits-toolkit helps research keywords, search demand, related terms, and content opportunities for SEO.
seo-os helps monitor local SEO visibility, map rankings, business listings, and local search performance.
Seo-Promt-Master crawls websites to audit SEO, accessibility, performance, and technical page issues.
Seodity is an SEO toolkit offering keyword research, competitor analysis, content generation with AI, rank tracking and backlink checking. Plans have monthly limits covering projects, tracked keywords, audits and AI articles.
Seoformulas helps research keywords, search demand, related terms, and content opportunities for SEO.
SEOMacroscope crawls websites to find broken links, redirects, and technical SEO issues.
SEOnaut is an open source SEO auditing and reporting tool. It crawls websites and checks for broken links, redirects, duplicated or missing meta tags, heading issues, hreflang problems and missing image alt attributes. The tool can be configured to crawl subdomains or sitemaps, follow nofollow links, check external links and access password-protected sites via HTTP Basic Authentication. It can also create WACZ archives of a site.
SERanking tracks rankings, SERP visibility, and keyword performance across search results.
Serp Miner helps research keywords, search demand, related terms, and content opportunities for SEO.
SerpApi tracks rankings, SERP visibility, and keyword performance across search results.