what are you using to edit epub 3.0?

[xmlgirl]

I have an older version of Dreamweaver and it doesn't like the new HTML5 tags or the extra namespaces.
Is there any kind of HTML/EPUB editing software that validates HTML5?
I can upgrade Dreamweaver if I need to, but if there is something better out there, maybe I'll do that instead.
Thanks

[holymadness]

For mac, Espresso is my go-to program. Coda is quite popular, as well.

[lordmax]

I don't like dreamveawer and inDesign, they're no more good tools

For html5 validation I use the official validator at w3c:
http://validator.w3.org/#validate_by_upload

For epub version 2 I use Sigil and epubcheck

For epub version 3 I use epubcheck

For editing purpose of epub3 I'm usign libreoffice with writer2epub for first part of work (it do a really good job) and then I decompress the epub and work with a text editor (I'm on kubuntu so my editor of preference is Kate).
For epub2 obviously I'm using Sigil.

Just the mobi conversion create some glitch

[PageLab]

The recently launched BlueGriffon ePUB edition can deal natively with ePub3, but I can't say if it's better than the other tools you mentioned, I haven't tested it yet. http://www.bluegriffon-epubedition.com/BGEE.html

[lordmax]

Well, maybe it's good but

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195$ + VAT just to try it's a little more than I can afford.
^__^

I will try it obviously buy only the trial version

Thaks