How can I resize a window that doesn't have the grabbing part on the bottom right?

Hard to find free softwares for this, I only found a donationware :

  • Window Wrangler

Otherwise, you can have paid solutions :

  • Cinch, which a nice and useful windows manager.
  • MondoMouse
  • Zooom/2

I use MercuryMover for move or resize windows with keyboard.

MercuryMover is a utility designed to help you keep your hands on the keyboard. Installed as a System Preferences panel, MercuryMover makes it possible to move and resize windows using just the keyboard.

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