<p>What Windows code editors allow the use of <a href="https://en.wikipedia.org/wiki/Tab_stop#Elastic_tabstops" rel="nofollow noreferrer">elastic tabstops</a>, either natively or through a plugin?</p>

<p>I know about a gedit plugin, but it only works on Linux.</p>

I did quite a bit of googling trying to find this answer. There are plenty of people asking for it:
http://developers.slashdot.org/comments.pl?sid=414610&cid=21996944
http://www.arguingwithmyself.com/archives/75-the-biggest-feature-your-editor-is-missing
http://intype.info/blog/screencast-parser-in-editor/#comment-221
http://codewords.wordpress.com/2006/10/16/eclipses-achilles-heel/
just to name a few...
so I don't think one exists yet, sorry :(