This addon adds in a Faerie, or Fey, race into ToME. This addon was originally created by Kaballah, but he hasn't been online in over a year.
Instead of letting it die (I mean, how could we not be able to play as a Faerie?) I decided to fork it over into a playable form.
I've taken it, modified it's values, and changed it's 4th talent.
You can nab it here.

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The Fey are an incredibly quick and agile race, however they are incredibly fragile.
You will have to make use of their blinding speed to survive encounters.
If you find yourself in trouble, you can spray some Fey Dust onto nearby enemies while you escape.

Fey stats:
-2 Strength, -5 Constitution, +3 Dexterity, +3 Cunning, +6 Luck,
Life per level: 7
Experience bonus: 5%
Unbreathing

Fey skills:

-Flight
--Passive
--The Fey are capable of flight.
--Avoid certain traps
--Grants bonus Movespeed and Defense, that scales with Dexterity or Magic
--Effect grows if health is low
--Pretty magical wings

-Fey Luck
--Passive
--The Fey are naturally lucky, and this aids them in many ways.
--Grants Luck and Saves
--If you take more than 10% of your life in damage, some of the damage is nullified, and you gain a shield of equal value.
--Scales with Luck
--Effect grows if health is low

-Fey Speed
--Active
--The Fey are always fleet-footed, and are ready to split upon a moment's notice
--Grants bonus Global Speed that scales with Dexterity or Magic
--Effect grows if health is low when activated
--Removes all Pinning effects

-Fey Dust
--Active
--The Fey's Dust, while pretty, turns out to not feel good when thrown into eyes
--Sprays a cone of Fey Dust, which deals damage that scales with Dexterity or Magic
--The spray also knocks back and blinds enemies hit
--It can also stun or confuse, if used at low health

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Dark Faeries are Faeries that have given up much of their natural agility and defense in exchange for bonus offensive potency.
They are extremely frail, even more so than their more agile counterparts, but make up for it with faster offense, higher damage, and many different tricks.
Despite all thoughts otherwise, they are still, mostly, a playful bunch to be around, if not a bit more painful in their method of invitation.

Dark Fey stats:
-3 Strength, -7 Constitution, +3 Dexterity, +3 Magic, +1 Cunning, +6 Luck,
Life per level: 5
Experience penalty: 5%
Unbreathing

Dark Fey skills:

-Powers of the Dark
--Passive
--The Dark Fey have sacrificed their Flight for additional offensive potency.
--Grants bonus Cast Speed and Combat Speed, that scales with Dexterity or Magic
--Grants bonus Damage that scales with Luck and Character Level
--Effect grows if health is low

-Fey Clone
--Passive
--The Dark Fey have given up some of their natural luckiness, but not all.
--Grants Luck and Saves
--Upon dealing damage, you summon a clone of yourself for a few turns.
--Has your entire talent list, deals 50% damage, and has 10% of your max life.

-Vision of the Shadows
--Active
--The Dark Faerie has lost it's ability to flee, and has been forced to find other methods of survival, in the form of dark magics.
--This talent shows all enemies within a moderate to large radius around yourself.
--Calls forth 3 shadows onto nearby enemies that are in sight.
--Shadows are extremely weak, but make for decent body-blockers.
--Vision Radius, Vision Duration, and Number of Shadow Targets increases with talent level.

-Feyd to Black
--Active
--Call forth the powers of darkness to overflow the battlefield, affecting all Actors in sight range.
--Increase all allies life by a percent of their Max Life. (Including yourself.)
--Decreases all foes life by a percent of their Max Life.
--Blind all foes, even those who cannot normally be blinded.
--This effect's power increases as your life decreases.
--This talent does not proc healing effects, and cannot lower enemies below 10% of their max health.

Modifies the character creation dialog to bypass the lock check for races and classes, allowing characters to be created using locked races and classes. Doesn't actually unlock anything.

Frequently Asked Questions:

• Hey, the character creation dialog still says I have locked races/classes! What gives?
• Will this prevent me from unlocking things?
• The latest version of the game has a new locked race/class. Will I need a new version of this addon to access it?
• What the heck is this Runic Golem thing?

[License note: This addon uses a modified version of an image by Lorc from Game-icons.net, pursuant to the Creative Commons CC-BY-3.0 license.]

This addon adds Mountain Trolls as a playable race to the game.

Adds the Vor'tep as a new Giant sub-race, a breed of altered trolls. Get it right here or on the Steam Workshop.

Vor'tep have a life rating of 13 and an experience penalty of 15% and start with +3STR, +3WIL, +3CON,+3MAG, -2DEX, and -2CUN.

Vor'tep posses the strength and will to wield any one-handed weapon in their offhand innately.

Vor'tep have the following racial talents:

Trollkin Fortitude
For 5 turns, each magical, physical, or mental detrimental effect applied to you by an enemy will have the duration preemptively reduced by X turns or 50% (rounded up), whichever is greater. If this reduces the duration to 0 or less the effect is completely negated. The power of the effect improves with Constitution.

Trollblood
Passively increases life regen by X and healing modifier by Y%.
Scales only on talent level.

Blood Rush
Sustaining this talent will cause talents to cooldown by one turn at the begining of each turn. This will occur regardless of stuns or other effects that would normally reduce or prevent cooldowns. This will not effect talents with a fixed cooldown.
CAUTION:
This will cause you to take X% of your maximum life as irresistible damage on the first turn, increasing each subsequent turn. Each turn the damage dealt will be 15% greater than the turn before. If your life is below 20% of your maximum at the start of a turn, the sustain will automatically deactivate.
The damage of the effect is reduced by Willpower.

Internal Inscription
You are able to internalize a rune or infusion of your choice. Once chosen, the inscription will be triggered instantly when you are below 15% of your maximum life. This has a cooldown and is the only way to activate the inscription.
Cooldown decreases significantly with talent level and is based only on this talent (the original cooldown of the inscription is completely disregarded).

Talent icons from game-icons.net.