Came across this the other day, basically it's VIM for 8 bit machines and the C64 appears to be the most supported with binaries included in the archive not only for 40, 53, 65 and 80 columns - But there's also a VDC binary that I assume is for a hardware 80 column card...
...That sadly I don't have...
Anyway, I tool a few screenshots, take a look. Link here:
http://vi65.sourceforge.net/
Now bear in mind that it's really hard to take photo's of CRT's - So the pics don't do the result justice for software 80 columns. Although I have seen better software 80 column fonts.
And here's the mysterious 'VDC' binary: