Here are links to digital editions that were mentioned in the course of the day:
Klagenfurt edition of the works of Robert Musil
Chinese Buddhist Electronic Text Association (CBETA) – in the Chinese Buddhist version!
Letters of Van Gogh (ah, the Van Gogh letters!)
Mark Twain Project (Autobiography of Mark Twain)
Henrik Ibsen’s Writings (Maximum Edition online, Minimum available in print)
Edition project of the Works of Thomas Le Roy (still virtual, presented here)
Digital Edition of Slowenian Literature
The Homer Multitext Project
And I came accross the Catalog of the Scholarly Digital Editions while browsing.