I realised that I didn't have any perfectly square fonts, so I made one. Cellblock has no slants at all, which led to some rather unusual letterforms. Contains Greek and Cyrillic as well as accented Latin.
Cellblock NBP font— Created in by
Cellblock is part of the NBP Collection
Created by Nate Halley, generated by Fontstruct. Licensed under CC BY SA
Creative Commons Attribution Share AlikeMore info
Version 1.0 (3-May-2013)
FontStruct is a trademark of FSI FontShop International GmbH