HD, printable, modular dungeon tiles and LOADS of assets. There's a free download pack in the comments : r/battlemaps
PDF] DND Character Sheet PDF Download – PDFSource.org
Free to Download: Dungeons & Dragons Adventure Game (AD&D 2e core rules)
D&D 5e) Tasha's Cauldron of Everything [PDF][Epub][Mobi]
An artist created 3D models of every D&D monster, and they're all free - Polygon
Slight variant on the normal character sheet, free download. "Fully-Loaded 5E Character … | Dnd character sheet, Character sheet, Dungeons and dragons characters