About HTML Kickstart, I saw this, and I think that it does not have an updated view, almost always the front framework interface has a structure of 12 columns, so Bootstrap uses 12 columns and has a very active community. About HTML5 The Boilerplate is the starting point for creating a web page in HTML5, so both have different goals, and both can help each other. That way you can use both. Skeleton is another competitor to Bootstrap, and I think if you need to create a website with menus, navigation, lists, tables, a slider, forms, etc. Bootstrap has these components, so you will need to copy and paste, while Skeleton is just the basic structure of the columns, no more.
So, it's best to use both: HTML5 Boilerplate with Bootstrap, both can give you a safe and responsive website.
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