Position	Website	Change	Thumbnail
1	validator.w3.org - The W3C Markup Validation Service W3C	0
2	en.wikipedia.org - Wikipedia, the free encyclopedia	1
3	xhtml.com - XHTML Reference An XHTML reference focused on best practices, plus articles and tutorials on CSS, XML, Web standards and accessibility.	-1
4	w3schools.com - W3Schools Online Web Tutorials HTML XHTML CSS JavaScript XML XSL ASP SQL ADO VBScript Tutorials References Examples	0
5	totalvalidator.com - HTML / HTML5 / XHTML / WCAG / Section 508 / Links / Spelling Total Validator is an (X)HTML validator, an accessibility validator, a spell checker, and a broken links checker all rolled into one tool allowing one...	8
6	tools4noobs.com - Tools 4 noobs - tools you didn't even know you needed	-1
7	tantek.com - tantek.com	10
8	wordpress.org - WordPress › Blog Tool and Publishing Platform	10
9	webstandards.org - The Web Standards Project The Web Standards Project is a grassroots coalition fighting for standards which ensure simple, affordable access to web technologies for all.	0
10	stackoverflow.com - Stack Overflow	-2
11	reference.sitepoint.com - SitePoint CSS Reference Learn CSS at the SitePoint CSS Reference. With full descriptions, working examples, and browser compatibility information on the entire CSS language.	35
12	hestia.venturas.org - Venturas.org | João, Alexandra, Leonardo and Rafael	0

I have no idea. Please, refresh tomorrow ;)

Site	Traffic	Engagement
w3.org	56.6%	1.2x
w3schools.com	11.7%	0x
wikipedia.org	9.9%	0x
xhtml.com	6.3%	0x
validome.org	6%	0x
Other	9.5%	0x

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