Here’s an extremely well done unofficial army book for halflings in Warhammer Fantasy.
Nippon is a fan created Warhammer Fantasy Battles army book.
The Norse is a fan created army book for Warhammer Fantasy Battles.
Kislev is a fan created Warhammer Fantasy army book based on Polish and Eastern European archetypes. You just cant’ go wrong with winged hussars!
Cathay is an army book for Warhammer Fantasy based on Oriental archetypes.