Everything you need to know to master VIM, a free vi clone running under various platforms. The VIM Quick Reference Card is released under the GNU GPL (General Public Licence).
This is a reference card for zsh. It was created based on version 3.1.9 so is a little out-of-date. It is seven pages long, even with three columns per page, so you will need a very big piece of card to stick it to.
F. Zhang, B. Jin, T. Ge, Q. Ji, and Y. Cui. Proceedings of the 25th ACM International on Conference on Information and Knowledge Management, page 619--628. New York, NY, USA, ACM, (2016)
A. Brodsky, S. Henshaw, and J. Whittle. RecSys '08: Proceedings of the 2008 ACM conference on Recommender systems, page 171--178. New York, NY, USA, ACM, (2008)