Broad-side swords, crossbows, battle axes and catapults are the common ones.

The Trebuchet is a weapon that flung rocks or dead cows hoping to spread disease. catapults were out-classed by the monagol

Allow me to expand on this answer:

I'll assume that we're talking about the mid-medieval era, and there were MANY different weapons for many different purposes.

Swords were acctually less common then many people think - they worked well against unarmored peasents, but they were only usefull for breaking bones if someone was wearing chainmail. They were almost alltogether useless against a fully armoured knight. To take down one of these walking tanks, a Mace or other blunt-type weapons were prefered by many nobles. Getting bashed on the head by a big heavy piece of steel leaves your ears ringing if you're wearing a metal helmet...and taking off your helmet after a good hit would be many people's first instinct - which was the whole idea behind hitting your helmet to begin with.

Halberds were another handy weapon with multiple roles, useful against mounted and dismounted soldiers alike.

Bows were another common place weapon. Particularily the longbow with England, which Henry V used in a desicive victory over the french heavy cavalry at the battle of Agincourt in 1415 during the hundred years war.

here's a list of weapons I can think of off the top of my head:

Spear, Lance, Javeline, Axe, Mace, Swords(short,broad) Clubs, Bows, Halberd, Pike, Bows (short, long, cross),

and last but most certainly not least.....gunpowder!!(towards the end anyway)

i know i didn't include all weapons by anymeans, and everything i mentioned was handheld with the exception of gunpowder.

mostly farm tools were used because that's who fought the most not everyone was a knight in medieval times lol scythes were used ad so were flails both of which farm tools knights in full armor had a hard time walking because the armor was usually very heavy and knights on horseback sometimes had boots that made walking similar to walking with flippers it's wasn't the weight of the armor that was the problem usually though it was the flexibility

ANSWER 2

swords, 2 handed swords, crossbows, maces, battleaxes, flails, daggers, spears, javelins, clubs, bows and arrows. Just play runescape and know the answer.
Technically, a weapon is anything used for attack or defense, and medieval refers to something from the Middle Ages, so a medieval weapon would be something from the Middle Ages used for attack or defense. However, specific weapons present during the middle ages included many types of edged weapons (all variants of swords, daggers, axes or knives) ranged weapons such as bows, recurve bows, longbows, crossbows, javelins, throwing axes etcetera, polearm weapons such as spears, pikes, halberds, bills etcetera and siege weaponry ranging from catapults, mangonels and trebuchets etcetera through to siege towers, battering rams etctera.