Post by Arietta Papaconstantinou noted just now on the papy list (closed archive, sorry, so no link to original message):
Pinakes: Greek texts and manuscripts
The Institut de recherche et d’histoire des textes (CNRS, Paris) is happy to announce that the Pinakes database (formerly Greek Index Project) is now available for consultation in a free web version.
The database lists the manuscripts of Greek works written prior to A.D. 1600, for the most part recorded in printed catalogues of manuscripts.
The current version of Pinakes includes 200,000 entries. It provides manuscript listings for 13,000 works, which represent almost 40,000 manuscripts from 1,300 libraries worldwide. The records are intentionally brief and concise. The focus is on the content of each manuscript (authors and works). Dates are given according to catalogues. Basic codicological and paleographical information is provided only insofar as it is related to the texts.