What do you mean by "Drupal extensions designed for libraries”? Drupal 8 is one month into release, and there are no library-specific modules that I know of. Many of the the Drupal 7 modules that are popular in the library world (and everywhere else) such as the awesome webform module, aren’t in general release, yet.
We build a lot of Drupal websites for libraries, and we do not expect to be creating any general library sites in Drupal 8 until later this year. Drupal 7 will be supported until Drupal 9 is released, and with Drupal's new point release strategy, I estimate that Drupal 9 is at least four years out.
Drupal 7 has broad adoption in the library community, and it has a wide range of modules and tools for libraries. I recommend that you join the Drupal4Lib mailing list <http://listserv.uic.edu/archives/drupal4lib.html>. There is also a Libraries Drupal group <https://groups.drupal.org/libraries>.
> On Mar 15, 2016, at 8:39 AM, David Uspal <[log in to unmask]> wrote:
> We're in the process of evaluating Drupal 8 as our main site CMS (we're on Concrete5 v6 so migrating to v7 is a large effort, which makes this a good time to evaluate alternatives). As such, I'm trying to compile a list of the most used Drupal extensions designed for libraries that are compatible with Drupal 8. Does anyone know where such a list might be found and/or could help in compiling such a list? Thanks!
> David K. Uspal
> Technology Development Specialist
> Falvey Memorial Library
> Phone: 610-519-8954
> Email: [log in to unmask]