What Are Some Cool Softwares And Applications To Study Chess ?? ( If Possible Add Links In Below . )

Lucaschess, now with all the Maia engines.

I highly suggest nibbler it's not very famous but it's insanely good

Lichess is always great but maybe like me you want something for offline use so go for nibbler

also this site:
playgrandmasters.com/index.html

You will use it against me!
CLASSIFIED!

#11 Lucaschess is the weirdest chess GUI I have ever seen, followed by Arena.