You cannot really suggest a vi replacement that runs on non-UNIX. Sorry, I'd like to try it out.
So the source is indeed available but it isn't really open so it hurts in outside contributions.
[1] http://github.com/etexteditor/e/blob/master/docs/license.txt
http://github.com/etexteditor/e/blob/master/ecore/libecore.s...
http://github.com/etexteditor/e/blob/master/ecore/libecored....
* Any redistribution, in whole or in part, must retain full licensing functionality, without any attempt to change, obscure or in other ways circumvent its intent.
That would imply that you have to keep the binary blobs, and that you wouldn't be allowed to reverse engineer them (say, if the E-text editor guy goes out of business).Obviously the only real test of the wording is in court, but it'd be enough to make some people steer clear of it.