Part of the beauty of Dungeons & Dragons is that it requires very few materials to operate, players can essentially show up with just a character sheet and be ready to dive in. However, that doesn't mean there aren't a myriad of useful and fun extraneous items that can be brought into a campaign to enhance it. Whether it's specialized in-game tools or just things that help with immersion, there are plenty of amazing fan-made creations that can enhance a Dungeons & Dragons experience.
https://screenrant.com/best-dnd-fan-creations-dice-journal-dungeons-dragons/