These came from the game itself and are the reference calls in the code for the quests. This will at least give you an idea of all the quests and who to go to for them. The name is the NPC that has the quest and the "" are the calls in the game for the quests. If anyone wants to add the quest log name for these be my guest. *Note* Some of these quests will not be available till later in the game or when certain requirements are met. Also if you find a quest that is not listed here please add it.
Santa Monica Quests
Arthur Kilpatrick
"Arthur Knox"
"Bail Jumper"
"Muddy"
Knox
"Asian Vampire"
E.
"Lily"
Therese
"Hotel"
"Release The Spirit"
"Diner"
"Tourette"
Email
"Werewolf Blood"
"Ming"
La Croix
"Mercurio"
Jeanette
"Slashterpiece"
M. Strauss
"Strauss"
Bertam
"Bertam CD"
Jack
"Blood Hunt"
Newspaper
"Serial Killer"
Downtown Quests
Regent/Damsel
"Plague"
Fat Larry
"Traffik"
"Confession"
Venus
"Venus"
Boris
"Kill Venus"
Skelter
"Junky"
Pisha
"Necromantic"
"Occult"
La Croix
"Dane"
"Grout"
"Musem"
"Shangrila"
"Sacophagus"
"Alliance"
Beckett
"Johansen"
China Town Quests
Wong Ho
"Kiki"
"Gangster"
Mandarin
"Johnny"
"Mandarin"
Ji Wen Ja
"Hitman"
Yukie
"Yukie"
Mr. Ox
"Eyes"
"Ox"
Gary
"Giovanni"
Hollywood Quests
Isaac
"Courier"
"Gargoyle"
"Tape"
"Kings Way"
"Barabus"
VV
"Strip"
"Writer"
Ash
"Hunters"
Romero
"Romero"
"Loser"
LaCroix Via Email
"Tommy"
Imalia
"Imalia"
"Guy"
Mitnick
"Mitnick"
Enjoy,
Drimitz