Package, image and docs hosting that carries real authority. There are 127 in this list, 123 of them free or with a free tier. Every entry shows what it costs, how much work it takes, and links straight to the submission page.
Add your static site generator or headless CMS through a pull request to their GitHub repo.
Package your stable cross-platform CLI for pkgsrc, test it with pkglint and supported builds, include the canonical homepage, then submit via pkgsrc-wip or NetBSD's package bug tracker.
Open a pull request to the Nuxt modules repository to list your module.
Build your OpenWrt-compatible service or utility for a real router/privacy/security workflow, add correct package metadata and tests, then submit it to the official feed.
Create a Void package template for your mature CLI, test native and cross builds, include the canonical project homepage and submit it to void-packages.
List an operational CSIRT, CERT, SOC, ISAC or PSIRT after securing sponsors and passing the community-vote process.
Submit data underlying your legitimate -related research paper and include related software/project identifiers.