Shameless plug - Text editor in 512 bytes (1kb if you include the kernel): https://bitbucket.org/danielbarry/saxoperatingsystem/src/mas...

https://github.com/antirez/kilo

Edit: oops, yours is in assembly, so definitely not in the same vein :-p (except for both trying to be small!)

Edit2: ... and, the article is about kilo. D'oh. This is what happens when you go first through HN comments, only to later open the article (which I do often!).