What are some websites every writer should know about?

Which websites for you personally, do you find invaluable for your writing? Interested to know what corners of the web us writers go to and why these particular websites are conducive to your creativity- would be awesome to find out what works for you!

Thank you so much everyone- I have put together all of the suggestions from you guys, which now live in a Google Doc, otherwise its a case of TL;DR where you would have to go through all the comments- so I have done this for you! I have added a few of my own that I hope will also help. In total, there are 99 suggestions!! I am happy to keep updating this if any new suggestions come through.

https://docs.google.com/document/d/1VCm-AdOkfWKFCNF1EiDso2-LD-JNU5slT05WosgC2QQ/edit?usp=sharing

P.S- I'm Emma and I help writers develop their creative writing and practice. If you would like to read such writing tips and guides, visit my website where is publish writing tips and more, subscribe!