Bootstrap is of course a very popular framwork, but it is a frameowrk I first used to teach myself and still my favorite. Express is a node.js framework I just started using and grown to like especially for back-end development purposes.
The bases of documenting any web page. It is one of the sole languages used for Web Developers. I defintely need to know this.
You cant ever make a website look good without this language. Every Programemr needs this to style their pages.
One of the most powerful languages behind the functionality of websites. Within the javascript branch I have been learning D3 javascript and Node.js.
Needed for the purposes of storing data into somewhere. Databases are an important factor to learning about the full extend of back-end development. I have used MySQL with a php program and MongoDB with mongoose with Node.js