CSS resets
CSS resets can save you a lot of time matching a duplicate experience for each web browser. There is no absolute right or wrong answer when it comes to browser resets.
Normalize.css
A modern, HTML5-ready alternative to CSS resets. Normalize.css makes browsers render all elements more consistently and in line with modern standards. It precisely targets only the styles that need normalizing.
Reset CSS
The reset styles given here are intentionally very generic. There isn't any default color or background set for the body element
minireset.css
A tiny modern CSS reset
Reboot
A collection of element-specific CSS changes in a single file, kickstart Bootstrap to provide an elegant, consistent, and simple baseline to build upon.