I'm glad to announce the release of the asciidoctor-bibliography gem. It just reached v0.4 and is mature enough for usage.
This asciidoctor extension aims at providing a simple and versatile solution for citations and bibliography management.
It leverages CSL for formatting, so thousands of crowdsourced styles are immediately available.
Another important feature that's definitely attractive for people coming from the LaTeX world is that all the traditional citation commands are recognized as asciidoc macros and rendered as you'd expect.
More informations and a quick start guide are available at the github repo.
I developed this tool for Ribose Inc., so ask away if you have any doubts or difficulties.
Suggestions are also most welcome.
One suggestion: In my (limited) experience it's a bit rough when citing in a footnote. Please see if there are wrinkles that could be ironed out there.
(I got it to work by putting the citation in an attribute-entry value, wrapped in pass:m,a, and then referencing the attribute.)