3 Useful Killer
Websites for Web Developers
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CSS-tricks
you can get lots of tweaks and tricks about the cascading style sheet(CSS)
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DevDocs.IO
single-page open sourceapp that allows you to search documentation
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Yes, doc of all popular programming languages and frameworks in one single web app
Tool that generates tags for any website and also you can edit and experiment with your content and then preview how your webpage
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Metatags.io
Hope you enjoy it
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