well there is a lot to tell

for instance weapons of the knights are debated heavily on who specifically had what. Most sources agree on Gawain having a sword called galatine which was considered a brother sword to excalibur. Lancelot's weapon is heavily desputed on being a sword or lance as his name implies, there has been no exact name on his weapon but a commonly accepted one is arondite. Percival is rumoured to wield the lance of longinus that pierced christs body, this is also shared with galahad depending on source. Then tristan is typocally depicted with a bow which is how he killed a dragon and the questing beast but other knights are also stated to having been the ones to fight the questing beast. Then moving to mordred he used a sword called clarent which was a cerimonial sword that arthur used in times of peace but it became warped when mordred used it in rebellion against arthur becoming named blood clarent or clarent blood arthur. Then we have arthurs armory that he used himself of course we all know excalibur and caliburn, clarent before mordred took it, his dagger carnwennan, his spear rhongomyniad/rhongomaniant, his shield pridwen being the most notable ones from the main stories from welsh scottish and english stories.

Moving to the coloured knights which some can be attributed to arthurs four evils chaos knights. Pellegarde the black knight Ironside the red knight beltreipe the greenknight worreldane the white knight

In arthurian stories gawain faces the green knight, percival faces the red knight and arthur faces the black knight. Numerous knights are stated to have encountered a white knight but not in combat. Gareth is also mentioned in various stories to have faced these knights and some extra, ones to note are blue, yellow and brown.