Dune 2.8.0 has been released. You can download the tarballs or checkout the v2.8.0 tag via Git.

Included in the release are the core modules (dune-common, dune-geometry, dune-grid, dune-istl, dune-localfunctions) and at this point in time the dune-uggrid, dune-typetree, and dune-functions module. Details on the changes can be found in the release notes.