ed

• + next / previous -
• CAPS instead of ! for forcing
• dot/^C for ending mode
• append; change; insert (before)
• ,p print everything

Vim

• ^a → iterate
• ^x → de-iterate
• % → next (curly/square) bracket
• ^ → start of the line
• $ → end of the line
• window-related
  • ^w = → tile window
  • ^w j/k → previous/next
  • ^w c → close window
  • ^w f → edit cursor-selected file
• spelling (variables: spell & spellang)
  • ]s → next misspelled word
  • [s → previous misspelled word
  • z= → find suggestions
  • zg → add to wordlist