Sword and fencing links

• Damascus steel
• fencing terminology
• Paradoxes of Defence - articles from 1598 and 1599 on fencing and the rapier
• rapiers
• sword and buckler medieval manuscript
• sword statistics

General weaponry and armor links

• Calderon's company and links on 16th century conquistadores. With a link on weights of arms and armor.
• shield and weapon weights
• brief description of historical weapons
• English civil war information, including some information on weight and length of halberds
• More descriptions of weaponry and armor from the Romans onwards
• pictures of weapons, and armour
• thrown weapons
• trajectory calculator for bows and crossbows

If you're interested in the properties of wood, and the weight of hafts that weapons had, densities of wood may be useful. For reference, the density of water is 1 g/cc or 1000 kg/m³.

Also, check the Guinness World Records. For example, to compare accuracy and distance for archery.