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.

Many in Maj'Eyal have heard of "demons", sadistic creatures who appear seemingly from nowhere, leaving a trail of suffering and destruction whereever they go. Their Fearscape floats far above the skies, watching and waiting, but not idly; their agents scout the land, their legions build up their forces, and their scholars develop new spells and strategies. As the barrier between our worlds begins to crack under their scrutiny, helpless Eyalites have begun to disappear, whisked up to serve as their slaves and playthings. They imbue these victims with magical powers to better survive the ensuing stresses - can you use your new-found abilities to escape the legions of Mal'Rok?

Features:

• Start with a new class, the Doombringer! These avatars of demonic destruction charge into battle with massive two-handed weapons, cutting swaths of firey devastation through hordes of opponents. Armed with flame magic and demonic strength, they delight in fighting against overwhelming odds, softening up the crowd with waves of fire, then feeding on the flames and suffering of their surroundings to stay alive while quickly reducing any group to a pile of ash and gore.
• Unlock a new class, the Demonologist, with an all-new item enhancement mechanic! Bearing a shield and the magic of the Spellblaze itself, these melee-fighting casters can grow demonic seeds from their fallen enemies. Imbue these seeds onto your items to gain a wide array of new talents and passive benefits, and summon the demons within them to fight on your side! Ever looked at a gigantic demon-cursed minotaur and wished it was on your side for once? Well, now you CAN summon one to pound your foes into paste while you cast devastating spells from afar, or call forth a squad of Fire Imps to pelt your enemies to death while they exhaust themselves on your impenetrable defenses! Demons have persistent health, making them a little more precious than disposable necromancer skeletons or summoner beasts, but can be revived from death nonetheless.
• Two new zones, with all-new art, foes, and bosses! You've seen the plains of the Fearscape before, now see the lairs and headquarters of the demons themselves!
• Over 10,000 words of written lore to find! The demons were once an enlightened, peaceful race, hailing from a distant planet known as Mal'Rok; learn what drove them to plot Eyal's eternal torture! Discover monuments to each of the demonic species and noteworthy individuals, showing the place of honor each has among them! Get a glimpse into the culture and daily lives of these sadistic invaders and their brainwashed thralls!
• Unlock a new race, Doomelves: Shalore who've taken to the demonic alterations especially well, corrupting their typical abilities into a darker form. Blink away to safety, transform into a shadowy dúathedlen to hide in the shadows or prey on your foes with blasts of darkness, use your new resilience to soak up status effects and critical hits, and assault your enemies' minds to leave them unsteady in combat!
• Between the aforementioned classes and Doomelves, a whopping 75 new talents!
• Unlock two new cosmetic options! You know you've always wanted demon-horns.
• Two new events, appearing anywhere in Eyal!
• 20 new artifacts, with unique and interesting effects. Collect the Obsidian Treasures to amass more and more power! Slip your hands into the Will of Ul'Gruth and watch your sweeping blows smash down walls! Wear a giant hideous hell-mouth as a fashionable belt!
• 7 new achievements! Conquer the worst Urh'Rok's forces can throw at you, and hang their metaphorical skulls from your profile page!

The Lost City of Vulcus

Some events in history are of such importance and have such wide ranging ramifications that they become fixed points -- junctions in time that must and will happen in order to maintain the integrity of the chronoverse.

Lost ages ago, Vulcus was considered by many to be the greatest center of Dwarven learning below the surface. Even up until the fall of Reknor in recent times, however, Dwarven innovation and breakthroughs continued, seemingly by miracle. Fate, however, dictates that one of the greatest untold secrets of the Empire cannot remain hidden forever. Perhaps you will be chosen to take part in this crucial point in history -- to reap the rewards or to suffer the consequences.

This addon incorporates a new major event (like the drake cave or fearscape invasion portal) that has a chance to occur (possibly more than once) on each level in various zones (Infinite Dungeon, Spellblaze Scar, Ardhungol, High Peak, Reknor, Shadow Crypt). Within the game, this event is most like a combination of the Lost Merchant and Limmir quests, and is intended to replace those for characters in the I.D.

Recommended level 10+ (depending on class). The intended difficulty is slightly higher than the Limmir quest, and there are gradations of success. Participating in the event when it spawns is completely optional and you can do it later if desired.

This is possibly the most complex encounter in ToME, with a large number of NPCs, enhanced AI, and various terrain effects. It is compute heavy and will tax slower computers (even with reduced graphics settings).

"The Heart of the Gloom... such a strange place. Yet many whisper of mysterious powers, only waiting to be grabbed by adventurers.",
"You were one of the brave (or foolish) few who dared enter, only to find themselves suddenly able to speak to various plant life.",
"Taming (or even befriending) many different forms of plant life have given you various powers.",

Makes the monsters of Eyal somewhat more talkative...and prone to insulting you. Featuring taunts from Gaslamp Games' roguelike Dungeons of Dredmor! Also now featuring the EXTENSIVE taunt collection from the iconic Dredmor mod, Death By A Thousand Taunts. This mod was created by Deeborm, and is only included with their approval. Three cheers for Deeborm! Relive your dredmor adventures in the world of Eyal.

You can also add your own taunts! To do this create a file named verbose_user_defined_taunts.cfg and place it in your settings folder where it can be friends with all the other .cfg files. Inside this file put:
verbose_user_defined_taunts = {"I'm a taunt! ", "Your taunt here! ", "Taunts everywhere, taunts everywhere "}
except with your taunts. Just make sure they're all comma separated and in quotation marks. Additionally, due to something weird in how the the speech is displayed a small bit of the final character can sometimes be cut off. Add a space before the closing quotation mark to head this off. After that save it and enable custom taunts from the settings menu in-game!

All taunts (base Dredmor taunts, Deeborm's extended dredmor taunts, and custom taunts) can be toggled from the in-game settings, in the Misc tab.

This addon is home to bonus races, objects, and even a custom zone, for all your turtle pleasures.

Races;
Turtle - The normal, all around tanky subrace. Destroy your foes with potent damage reflection and regenerative properties.
MegaTurtle - Imagine normal Turtle, turned up to 11.
EarthTurtle - Potent damage reduction and save powers. The purely defensive focused Turtle.
IceTurtle - Melee's nightmare, fights with constant damage shields, ice blocks, and cold damage reflection.
VolcanicTurtle - Incredible aoe potency. The purely melee focused Turtle.

Objects;
Tauntlets - Gauntlets with the power to block.
A multitude of varied Artifacts.

Zones;
The Turtlemire - Home to all Turtles, face off against all 5 Turtle subraces.
Ancient Turtle Cave - Home to the great Turtle Demigod Rex, make your way through 3 powerful Bosses, Rex himself, and claim your rewards.

Enemies;
All subraces can be found in the game as npc opponents.