Hammer & Sword Resource Pack 1.8.9
How to Install Resource Pack for Minecraft
Make sure your Minecraft is updated to 1.6 or higher
Download the resource pack and put it somewhere easily accessible (Desktop)
Open up your .minecraft from Run > %appdata% > .minecraft
Open the resource pack folder which is inside the .minecraft
Then just drag and drop your resource pack to this resource pack folder
Close everything and enjoy!