For fans of the great 13th-century Welsh poet, a lovely new online edition and translation of the poems of Dafydd ap Gwilym.
Incidentally, looking up Dafydd’s biography led to the discovery that the National Library of Wales has vastly improved the usability of its Welsh Biography Online. (Believe me, it used to be truly awful.) And the ever-expanding Digital Mirror has also had an overhaul of its user interface fairly recently.