From StillNorthMedia site: 

"You may use any of our sounds freely, with no royalties, and no credit needs to be given (although it is always appreciated)."

And from FreeFirearmsSFX, the project that prompted Still North Media's inception: 

"Our team holds CC0 NO RIGHTS RESERVED for this library. It may be used without royalty or credit (though we would love to hear how you've used our sounds) for any application, personal or professional. Have at it!"

See also these related submissions by the same team:

• https://opengameart.org/content/the-free-firearm-sound-library
• https://opengameart.org/content/medieval-sound-effects-weapon-textures

Please note that OGA is not affiliated with this project. We would encourage you to visit their site, but it is no longer available except via Archive.org (Thanks, Internet Archive!)

Big thanks to their team and all of their Kickstarter supporters for kicking off all that lead to this amazing content!

Sound effects in this package include:

• Axe Katana Blade on Blade
• Axe Katana Haft on Blade
• Axe Norse Sword Blade on Blade
• Axe Norse Sword Haft on Blade
• Axe Sabre Blade on Blade
• Axe Sabre Blade on Hilt
• Axe Sabre Haft on Blade
• Axe Sabre Haft on Hilt
• Axe Spear Blade on Blade
• Axe Spear Blade on haft
• Axe Spear Haft on Haft
• Dagger Axe Blade on Blade
• Dagger Axe Blade on Haft
• Dagger Katana Blade on Blade
• Dagger Norse Sword Blade on Blade
• Dagger Spear Blade on Blade
• Dagger Spear Blade on Haft
• Mace Axe Blade and Haft
• Mace Dagger Blade
• Mace Katana Blade
• Mace Norse Sword Blade
• Mace Sabre Blade
• Mace Seax Blade
• Mace Spear Blade
• Mace Spear Haft
• Norse Sword Katana Blade on Blade
• Sabre Katana Blade on Blade
• Sabre Katana Hilt on Blade
• Sabre Norse Sword Blade on Blade
• Sabre Norse Sword Hilt on Blade
• Seax Axe Blade on Blade
• Seax Axe Blade on Haft
• Seax Dagger Blade on Blade
• Seax Katana Blade on Blade
• Seax Norse Sword Blade on Blade
• Seax Spear Blade on Blade
• Seax Spear Blade on Haft
• Spear Katana Blade on Blade
• Spear Katana Haft on Blade
• Spear Norse Sword Blade on Blade
• Spear Norse Sword Haft on Blade
• Spear Sabre Blade on Blade
• Spear Sabre Blade on Hilt
• Spear Sabre Haft on Blade
• Spear Sabre Haft on Hilt
• Spear Spear Blade on Blade
• Spear Spear Blade on Haft
• Spear Spear Haft on Haft