CSS

Preprocessors
vs
postprocessors

SASS

vs

LESS

vs
STYLUS

CSSO

vs

PostCSS

Bootstrap

vs

Material

JS

Angular
vs

React

CoffeeScript
vs
Dart
vs
Typescript
vs
Babel

RequireJS
vs
SystemJS
vs
WebPack

RequireJS
vs
SystemJS
vs
WebPack

Unit tests

E2E tests

Linters

Other

NPM
vs
Bower

Gulp
vs
Grunt

Experiments

Mobile:
native
vs
web

IDE

Future