Kamodo (by David Morris)
Large Outsider (chaotic)
Hit Dice: 10d8 +70
Initiative: +4
Speed: 80ft.
AC: 20 (-1 size, +21 natural)
Attacks: Claw +12, Bite +8, Tail +10
Damage: Claw 2d8, Bite 3d6, Tail 2d10
Face/Reach: 5ft. By 5ft./10ft.
Special Attacks: Poison 3d8 hp, DC 15
Special Qualities: Tanrri, 45% magic resistance
Saves: Fort +6, Ref +8, Will +10
Abilities: Str 23, Dex 28, Con 15, Int 18, Wis 18, Cha 18
Skills: Hide +6, Search +8, Spot +9
Feats:: Multiattack, Powerattack

Climate/Terrain: Abyss/Any
Organization: Solitary
Challenge Rating: 14
Treasure: Standard
Alignment: Always Chaotic Evil
Advancement: 11-20 (large), 21-35 (huge)

Kamodos look like a very large 12 foot tall Lizard folk. They are highly evil and serve as elite warriors of the Abyss. They hate imps so much so that they kill them on site. 30% of Kamodos have wings. Their colourings are that of a deep green, crimson, or pitch black. All save the latter have pitch black stripes like that of tigers.

Combat:

They can use the following spell like abilities, at will: Deeper Darkness, Chaos Hammer, Summon Swarm, Invisibility, Doom, Summon Dead, Wall of Fire, Teleport Without Error.
Spells that are always active: See Invisible, Fly, Unholy-aura, Detect Good/Chaos (if wings don't have fly). They also attack with talons and their tail and they love using magical weapons, especially axes.

Society

Their society is like that of all demons', tempting mortals to their doom and trying to take over the material realm.

Variants

Fire borns, like above but don't have wings and don't have the power to raise dead. They can, though, at will shoot a Fireball from their hand as if cast from a 5th level sorcerer/wizard.

Kleinen (by Lord Serith)
Tiny-Size Humanoid
Hit Dice: 1d6
Initiative: +6
Speed: 40ft.
AC: 15
Attacks: Slam, 2 Claws, Bite
Damage: Slam 1d3, Claw 1d2, Bite 1d3
Face/Reach: 0
Special Attacks: Pea Shooter 1d3+1, Detonation 1d6, 2 Slashes 1d4
Special Qualities: Shape-changer
Saves: left blank by author
Abilities: Str10, Dex14, Int14, Wis14, Con11, Cha4
Skills: Hide +1, Jump +3, Ride +2, Search +1
Feats: Improved Initiative, Ambidexterity, 2-Handed Weapon Fighting, Weapon Finesse, Weapon Focus Special (detonation)

Climate/Terrain: Underground
Organization: 25- 5,000
Challenge Rating: 4
Treasure: Normal
Alignment: Neutral Evil
Advancement: cleric

Greyish blue skin, red eyes, no hair. Tiny, sharp-toothed mouths. No nose or outer ear. Only nostrils and ear canals.

Combat:
Kleinen shape-change to become rocks and then surprise their victims. A pea shooter is formed out of an air bladder on their backs and tubes formed from their arms. They fire pebbles out of their pea shooters. Their slash attack is from small blades formed from their hands. Kleinen can psychicly vibrate their molecules and explode (detonation). If increments of 10 Kleinen concentrate for one round they can mentally disable their opponent for one round after per 10 Kleinen.

Society:
Large groups of Kleinen take over dwarven mines and build their cities there.

variants:
They are forest green/brown and disguise as shrubs. They attack elves or fairies.