As it happens, most of these projects are JavaScript libraries leaving only Ember, Spine, and Batman labeled as bonifide "frameworks" by their respective maintainers.
If your intention is to build JavaScript applications and the different philosophies of these projects isn't obvious to you, then I think it's worth hearing Yehuda Katz and Tom Dale make the case for frameworks (specifically Ember) in their keynote presentation at Fluent 2014: http://youtu.be/jScLjUlLTLI
If your intention is to build JavaScript applications and the different philosophies of these projects isn't obvious to you, then I think it's worth hearing Yehuda Katz and Tom Dale make the case for frameworks (specifically Ember) in their keynote presentation at Fluent 2014: http://youtu.be/jScLjUlLTLI