- https://github.com/filiph/linkcheck
- https://github.com/wummel/linkchecker
- https://www.npmjs.com/package/broken-link-checker
- https://github.com/raviqqe/muffet
- https://github.com/bartdag/pylinkvalidator
- https://github.com/wjdp/htmltest
- https://github.com/raviqqe/liche
- https://github.com/JustinBeckwith/linkinator
- https://github.com/smallhadroncollider/brok
- https://github.com/butuzov/deadlinks
- https://github.com/lycheeverse/lychee