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For the purpose of studying subjects of interest (academic, technical, etc) in target language(s), I want to discover other publishers of cheat sheets or reference material similar to those in the links below; that is, overviews of key concepts, labelled pictures, taxonomies, e.t.c.

https://www.barcharts.com/subjects
https://www.barcharts.com/products
https://permacharts.com

With regard to accepting an answer, publishers of material in non-English languages—in particular those which overlap the ones tagged in this post—are preferred.

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