I realise that this isn't strictly GLAM-based, though it is heavily tinged with the archival!
The copyright of my long-offline web game, The Black Crown Project, reverted to me last year, and I've been putting together an archive of all the material I have for it; not just the assets, but all of the metatextual guff as well (notes, drafts, scans of documents, sketches etc.) I have no desire to return to it and redevelop it, so I've put it up on Github for anybody to use, tear apart and reconstitute it, as long as they don't directly charge for it.