Updating with a list compiled so far, as well as to bump thread so people can add the ones missing:
Origins-
*City Elf - guard in first room of Arl's estate
*Dwarf Noble - Scout, in the Deep Roads after being accused of killing Trian
Ostagar-
*Prisoner in the cage
*Elf messenger
*Dog
*Wounded soldier in Kokari Wilds
Lothering
*Merchant in dispute with Chantry
Random Encounters
*Zevran
*Bandit leader (part of Leliana's quest)
Circle Tower
*Blood Mage who begs for mercy
Redcliffe
*Lloyd the barkeep
*Owen the drunken blacksmith
*Connor
*Jowan
Urn of Sacred Ashes
*Brother Genitivi
Brecilian Forest
*wounded werewolf
*sick halla
Denerim
*Vaughn (if not killed in City Elf origin)
*prisoner in Arl's dungeon
Deep Roads
*Ruck