player.setav health 9999'

Spawn Indicated Item
Code: additem [item number]

Remove an Item from Inventory
Code: player.removeitem [itemcode] "#"

Add Spell to Character's Spell List
Code: player.addspell [spell code]

Remove Spell from Character's Spell List
Code: player.removespell [spell code]

Give All Spells to Player
Code: psb

Show Spell Making Screen
Code: ShowSpellMaking

Show Enchantment Screen
Code: ShowEnchantment

Force a Level Up
Code: advlevel

Force Skill Level Up
Code: advskill [skill]

Complete All Quest Stages
Code: caqs

Set All Quest Stages
Code: completeallqueststages

Set Hair Color
Code: hairtint [red] [green] [blue]

List Console Commands
Code: help

Kill Selected NPC Target (suicide if nothing targeted)
Code: kill

Kill All Non Quest NPC
Code: killall
Thanks to Corey N.

Lock Selected Door or Container with Indicated Lock Level
Code: lock [1-100]

Add Indicated Amount of Points to Indicated Attribute
Code: modpca [attribute], [number]

Add Indicated Amount of Points to Specified Skill
Code: modpcs [skill], [number]

Moves to Current Quest Target
Code: movetoqt

Spawn Indicated Item
Code: player.additem [item code] 1
Note: Here is a full list of Oblivion Item Codes.

Add 100 Lockpicks
Code: player.additem 0000000a "100"

Add 100 Skeleton Keys
Code: player.additem 0000000b "100"

Add 100 Repair Hammers
Code: player.additem 0000000c "100"

Add Unlimited Gold (change the 999 to any number to add unlimited Gold)
Code: player.additem 0000000f "999"

Code: player.coc [destination name]
Note: Here is a full list of Oblivion location codes.

Set the Weather
Code: SetWeather [weatherid], or SW [weatherid]
Note: Here is a full list of Oblivion Weather codes.

Add Indicated Amount of Points to Indicated Stat
Code: player.setav [stat] [number (1-255)]
Thanks to Ahmed for the correction on the above code.

Set Player Level
Code: player.setlevel [1-255]

Set Point of View Angle (default is 75)
Code: pov [number]

Reset Health to Full
Code: ResetHealth

Quit Game Immediately
Code: qqq

Revive Target
Code: resurrect

Save Game
Code: savegame [filename]

Set Camera Field of View in Degrees (default is 75)
Code: setcamerafov [degrees]

Set Fog Start and End Depths
Code: setfog [start] [end]

Set Character's Fame
Code: setpcfame

Set Character's Infamy
Code: setpcinfamy

Set Barter Gold for Selected Merchant
Code: setbartergold [number]

Remove Bounty from Player
Code: player.setcrimegold 0, or player.payfine

Set Bounty on Target
Code: setcrimegold [number]

Change Your Gender
Code: sexchange

Change Your Birthsign
Code: showbirthsignmenu

Change Your Class
Code: showclassmenu

Show All Log Entries for Indicated Quest
Code: showfullquestlog [quest id]

Show Quest Log
Code: showquestlog

Show Current Quest Log
Code: showquestlog 0

Show Completed Quest Log
Code: showquestlog 1

Show Current Quest Targets
Code: showquesttargets

Show Name, Race, Appearance Selection Screen
Code: showracemenu

Toggle NPC Conversation Subtitles
Code: showsubtitle

Window with the Full Game Scene Graph
Code: ssg

Toggle AI
Code: tai

Toggle Combat AI
Code: tcai

Toggle No Clipping / Collision
Code: tcl

Toggle AI Detection
Code: tdetect

Toggle Debug Display
Code: tdt

Free Camera Movement
Code: tfc

Toggle Full Help
Code: tfh

Toggle Fog of War
Code: tfow

Toggle Grass
Code: tg

God Mode (must be targeting nothing)
Code: tgm

Toggle Land
Code: tll

Toggle Leaves
Code: tlv

Toggle Menus
Code: tm

All Map Locations Shown
Code: togglemapmarkers

Toggle Sky
Code: ts

Toggle Trees
Code: tt

Toggle Wireframe
Code: twf

Toggle Water
Code: tws

Set Time Speed (30 is default, 1.0 is real time)
Code: set timescale to [number]

Unlock Selected Locked Door or Container
Code: unlock

Close Oblivion Gates
Code: CloseCurrentOblivionGate
Note: This will close the Oblivion gate you are in and set you outside of it.

Item Codes