A work in progress for the top 5 mods in Warband!
1.
Anno domini-
mod for Mount&Blade Warband set in 13th century Europe during the Crusades and Mongol Invasions. The game starts in March 1257AD, and is historically accurate to that point. From there, the player shapes the world with his/her actions, with the ability to let the Crusades or Mongols succeed at invading all of Asia and Europe.
2.
A clash of Kings-

For Mount and Blade: Warband 1.166. Based on "A Song of Ice and Fire" Features more graphic improvements and game improvements than i could ever describe. by George R. R. Martin.
3.
Perisno- 
is a total conversion slight fantasy mod based in the fictional land of Perisno. Only you can get a feel of what it is really like. Battle nasty minor factions, encounter unexpected events, and discover unique opportunities! Seek total domination or support another Lord in the rise of their kingdom.
Enter... and you may never return.
Perisno is a low fantasy setting with Elves, Dwarves, and (soon) Giants. There are some mythological creatures and magic, though magic is out of the player's reach. You can also choose to wield powerful relics like the mighty Flamebringer!