All of these ideas are mine. All of them besides the Mountain King, that one was for fun (although the details were written by me, I do not own the Mountain King). So, without further ado, here you go!
Duncan Stewart's (Crura/Zulatobari) Google Docs folder of 5e Homebrew
If you were hoping for some Dwarf Subraces, then her!
Google Docs:Dwarf Subraces