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You can browse the Ceylon Herd repo, or view the current module list, and even search for a module, using the menu at the top of each page.

The Ceylon Herd repo URL

Access Ceylon Herd directly from your Ceylon tools

$ ceylon compile --rep https://modules.ceylon-lang.org/repo/1/ com.acme.module
$ ceylon doc --rep https://modules.ceylon-lang.org/repo/1/ com.acme.module
$ ceylon run --rep https://modules.ceylon-lang.org/repo/1/ com.acme.module/1.2