D&D 5E What gaming aids from previous editions do you still use?

[Ezequielramone]

I have both ToEE and Returno to... (I played the pc videogame and want to run them someday)
A lot of Dark Sun box and booklets, both from 2nd and 4th ed (I'm running a 5e Dark Sun game).
Some Kobold Press Guides for pathfinder.
Domains of Dread from 2nd ed (I'm running Curse of Strahd, but wanted to create my own Domain for the PC of one of my players).
I use the Deck of Many thigs that you could print from the 4e magazine.
Manual of the Planes and Deities and Demigods from 3rd ed as references. Love the 3e cosmology.
Underdark and Power of Faerum from 3rd ed. UD is a great tool (I ran Out of the Abyss, want to run it again and love the underdark). And PoF has a lot of great info and tools for playing high level characters that don't go to the planes.

 

[3catcircus]

Pretty much anything from prior editions - either converting to 5e, stealing ideas, or even using directly - some aids are supplements, others are actual physical aids.

Love using the 1st edition City System and Lankhmar geomorphs for random city blocks.

The biggest thing I use is the 3.x era spell AoE templates from Steel Sqwire.