Related to the announcement  on the erlang mailing list a couple of weeks ago, otter is now available as a package on hex.pm - https://hex.pm/packages/otter
Comments, suggestions, requests for enhancement are all welcome.
Hmm, this sounds familiar, has it been in dev for a while now? It looks fascinating! Do you have an example usage repo to see how it works?
Thanks! OpenTracing itself has been in the works for a while (see http://opentracing.io). The development of this library itself was started late last year. We don’t have a usage repo yet, but the tests in the test/ folder should give you an idea.