Based on my search until now, AdminLTE seems to be the most popular way of doing it among most devs although a few others like material and coreui are also solid names. Source: almost 4 years ago

You could have a look at AdminLTE (https://adminlte.io/). - Source: Hacker News / almost 4 years ago

AdminLTE - This is by far my favorite because their open source version is "truly" open source, because they don't hold back stuff like calendar and chart plugins to lure you to the pro version. While they do have some premium templates, it's mostly custom styling on top of the base version, not any extra features. - Source: dev.to / about 4 years ago

Looks interesting, thanks for this. Link for anyone borderline curious: https://adminlte.io/. Source: over 4 years ago

I’ll show you how to assign and change the role lists for the users, selecting them by context, and I will also show you how to expand this application’s functionality. You know how to apply your work as an administrator and developer to the new features of the well-proven apptools software complex. With the addition of an adminLTE template, you can now quickly and easily create interface interactions for any... - Source: dev.to / over 4 years ago

The learning curve is that small. Also, you may have heard of https://matcha.mizu.sh, a CSS stylesheet to instantly make your web page stylized. - Source: Hacker News / over 1 year ago

Drop-in semantic styling library in pure CSS (https://matcha.mizu.sh/) by Simon Lecoq These semantic styling libraries always give me such a desire to use them - but once I use them I just feel too limited. Maybe that's just me. - Source: dev.to / almost 2 years ago

My Portfolio rel="stylesheet" href="https://matcha.mizu.sh/matcha.css"> href="#">Home href="#">Projects href="#">Web Development href="#">Design href="#">About href="#">Contact ... - Source: dev.to / about 2 years ago