The Paris Psalter - Complete text of the verse portion of the Paris Psalter (Psalms 51-150). - http://www.georgetown.edu/labyrinth/library/oe/paristab.html
The Burnet Psalter. University of Aberdeen - Full-page images (text and illustration) and details from this 15th-century manuscript. Includes an introduction, commentaries, notes on editorial and technical practice, and a bibliography. The text is accompanied by a full transcription of the Latin and - http://www.abdn.ac.uk/diss/heritage/collects/bps/
The Old Version & the related Tunes - Article on the most widely used early English psalter. - http://homepage3.nifty.com/dikaios/CMstudy/English/papers/OV.htm
The Paris Prose - Introduction and texts of 50 psalms from this Latin/Old English psalter. - http://www.aug.edu/augusta/psalms/index.html