Vim command modifiers

Vim has commands that modify the behaviour of other commands. I don’t know whether an exhaustive list exists. Here are a few that I know of (excluding autocommands):

:global and :vglobal

These are well known. They execute a command for all matching and non-matching lines in a buffer, respectively.

do-commands

They execute the command multiple times in different contexts.

• :argdo
• :windo
• :bufdo
• :tabdo
• :cdo
• :ldo
• :folddoopen
• :folddoclosed

window opening commands

They let you control the position in which a new window will pop up.

• :vertical
  There are also commands like :vnew and :vsplit.
• :leftabove
• :aboveleft
• :rightbelow
• :belowright
• :topleft
• :botright

tab opening commands

• :tab Makes commands that would open windows open tabs instead.
  Useful with :tab all

keep- commands

They prevent a command from modifying some part of Vim’s bookkeeping state.

• :keeppatterns
• :keepjumps
• :locmarks
• :keepmarks
• :keepalt

interface commands

• :silent
  It doesn’t affect :redir
• :unsilent
• :verbose
• :filter
  Filters the output of another command. Do not confuse with :!.
• :confirm
• :browse
  Useful with :browse oldfiles

other commands

• :noswapfile
• :hide
  Can be used with a command.
• :debug