Joël Biard, Science et nature: la théorie buridanienne du savoir (Vrin, 2012).
José Filipe Silva, Robert Kilwardby on the Human Soul: Plurality of Forms and Censorship in the Thirteenth Century (Brill, 2012).
Felicitas Opwis and David Reisman (editors), Islamic Philosophy, Science, Culture and Religion: Studies in Honor of Dimitri Gutas (Brill, 2012).
Richard de Mediavilla, Questions disputées, ed. Alain Boureau (Les Belles Lettres, 2011-), 6 vols. [If I may be allowed an editorial comment, this is quite a major publication. It edits an impressive set of disputations, from the end of Richard’s life, which amounts to a systematic treatise covering much the same territory as Summa theologiae 1a. Until now, it has been available only in manuscript. The edition of the Latin comes with a facing French translation. Three volumes are now in print, with a fourth scheduled for later this year.]
Henrik Lagerlund and Paul Thom (editors), A Companion to the Philosophy of Robert Kilwardby (Brill, 2012).
Paul Thom, The Logic of the Trinity: Augustine to Ockham (Fordham, 2012).
J. T. Paasch, Divine Production in Late Medieval Trinitarian Theology: Henry of Ghent, Duns Scotus, and William Ockham (OUP, 2012).
E. L. Saak, Creating Augustine: Interpreting Augustine and Augustinianism in the Later Middle Ages (OUP, 2012).
Tobias Hoffmann (editor), A Companion to Angels in Medieval Philosophy (Brill, 2012).
Thomas Manlevelt, A Token of Individuality: Questiones libri Porphirii, ed. Alfred van der Helm (Leiden, 2012). [Available free at https://openaccess.leidenuniv.nl/handle/1887/18623].
No doubt I have missed some things. Please send references and I will post another list later this fall.