Despite the glacial slowness in which literature enters the public domain these days, there are now a lot of old sword & sorcery stories available online as text files or free PDFs. This includes some of the more obscure entries on the 1e DMG’s admirable Appendix N. I’ve posted a list of links below for authors with several stories available online in the public domain. (Note that there are only a few stories available for some authors; don’t expect to find any stories of Fafhrd and the Gray Mouser behind the Leiber link, for example.)
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- The Caldera Campaign | Disgonzo's Hideout on Proof that D&D is the Apocalypse
- The Keep on the Borderlands | The Coin of the World on Why a West Marches Campaign Needs a Town (Moving Into the Dungeon, Pt. 1)
- AndreylMott on Running a Con Game pt. 1: Whaddya Want?
- グルコサミンサプリ関節 on Cartography to Conjure By: The Beauty of Player Maps