This is an attempt to aggregate key resources, docs, links, files, etc related to the CiviCRM User Interface (UI) and User Experience (UX) - so please edit this page in the wiki if you can add to it or correct something.
At time of writing, Shoreditch is the only theme which implements a consistent look-and-feel in both vocabularies. It is intended to be a bridge that provides a consistent
look-and-feel while other parts of the application transition from crm-* to BootstrapCSS.
Matthew Wire turned CAU into an early extension that can run across all CMSs, with CMS-specific overrides and some user-config. It uses responsive tables to considerably improve the mobile and tablet behaviour of Civi admin pages.