Sword of Chaos   - Eastern most part of the New Witchwood/Swamp; buried.
Sword of Light   - The network of caves near Dirkon, on the Western Isle. 
                   In a chest.
Sword of Silence - In the Icy Caves, Northern Isle. The caves with the Moon Druid.
Sword of Might   - Southern isle, Demon caves, in a chest
Sword of Dreams  - The dreamworld, head west after entering, its in a chest in a cave.
Sword of Shadows - Given after finding all the druids. Get it in Aveyond.