Which CSS framework is the best for freelance web developers ?

Question

Web Development Frameworks.

Answer 1

Answer to question:
Bootstrap framework.

Advice:
CSS frameworks may have advantages, but they also have drawbacks that are often overlooked. Be aware of those and also know the tools and APIs you have at your disposal for creating the CSS and markup of your sites and apps.

Answer 2

Currently it depends on you, and also on the requirements. There are frameworks that provide you with particular styles and components (like MDL or Materialize), so that your selection within a project with that style can be successful.

I like to use Bulma, since I feel lighter and I do not have JS dependencies.

Answer 3

Also take a look at sass and less for optimizing your css. It will let you store values as variables so you can just use the variable instead of retyping everything. It gets more higher level but I suggest looking at documentation for more.