My favorite is probably my OG Heisig’s Remembering the Kanji physical FLASH CARDS. Came in a box where you pull out a drawer. The drawer is divided into multiple sections so you can do SRS with the deck – he had instructions on doing physical SRS included! It was Anki WAY before Anki existed. I only used it briefly, but I love looking at it on the shelf, and I open it up maybe once a year or so and marvel at the ancient technology.
I also really like my J->J dictionary (Meikyo) which I use once a month or so just to keep up my old school meatspace Japanese looking up skills. In my old age, I’m going to soon upgrade to a BIG PRINT edition because right now I have to use a literal magnifying glass to read anything in it! LOL
by InternetsTad