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.

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.

Places the Sect of Kryl-Feijan event on the map as a zone entrance rather than an undetectable encounter.

Stoics are warriors who dedicate their lives to mastering countless secret techniques.
Their wide variety of abilities allows them to fight their way out of any situation.
However, in order to fight at full effectiveness, they must first focus and steel themselves against the battle to come. Exceptionally skilled Stoics are said to infuse their attacks with elemental powers to create radical new fighting styles.

Stoics are a warrior subclass inspired by the Samurai class from Hengband. They are a melee class with a wide variety of specialized combat techniques, but require judicious use of their unique Focus resource to succeed. Their advanced trees allow them to alter the element of their attacks and grant passive effects as long as the stance is maintained.

Adds two new shadowy Celestial classes.
First is the Moon Paladin, who fight using two weapons and the two moons.
Second is the Starslinger, who imbues their shots with the power of the stars.
Also two new subraces that start in the Far East, regardless of class.
Mardrop Humans and Star Elves.

Now with a new starting zone: Save the Sunwall crops from a worm infestation.
New second starting zone: The Tenebrous Glades.
Travel to the barely made training camp of Midnight via a jumpgate on the west side of the Gates of Morning, then head southwest.
The shadows summoned to conceal the camp have become restless and dangerous. Quiet them down and investigate what is working them up.

Currently there are nine new categories.
Celestial/Night: A utility based generic category that generates negative celestial energies.
Celestial/Lunar Combat: Powerful offensive talents invoking the power of the moons.
Celestial/Guidance: Some defensive and one offensive talents for Moon Paladin.
Celestial/Shooting Stars: Combines star magic with ranged weapons.
Celestial/Deep Space: Some high level celestial magic for Starslinger.
Celestial/Sigils: Shape negative celestial energies into traps.
Celestial/Glory: High level light magic for Sun Paladins and Anorithil.
Celestial/Moon Magic: Magic derived from the two moons of Eyal.
Celestial/Umbra: High level dark magic for Anorithil and Star Slingers.

It also grants Sun and Glyphs to Sun Paladin at 1.3 mastery.
Reworks Chants and Hymns, and buffs Sunburst.

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

Trolls possess the Trollblood talent, which grants them high life-regeneration, but makes them vulnerable to fire.
Their racial abilities scale with their size. A huge troll is a strong troll, but the higher they grow, the deeper they fall.

Race Stats:

Str = 3

Mag = -3

Will = -2

Dex = -1

Con = 5

Liferating = 18

Exp-Penalty = 1.4 (Trolls aren't known for learning things fast)

Size = Big (Increases with your racial abilites)

Fear Immune

Talents

Trollblood(Passive): Life-regen, but fire-vulnerability. Scales with size.

Scent(Active): Reveals the map around you, gives you a speedboost.

Resilience of the Trolls(Passive): Increases saves and size category. Scales with size.

Song of the Trolls(Active): AOE-damage with stun-chance. Scales with size. Increases size category.

I hope you enjoy this! I would be very happy to receive some criticism :) If you got something to mention about balancing issues or if you find some errors, just tell me, i'll update this frequently.

Adds Beholders as a playable race. Created by ajfluffy (design, code and conception) and rexorcorum (ideas and artwork), this addon is now being maintained by Nagyhal under the guidance of rexorcorum in ajfluffy's absence.

Edit: Had to change the addon's short_name, and so v1.0.6's automatic upload helpfully made us a completely new addon page. Of course it's all on Steam, which is beautiful (thank you DG!), but I'm hoping we can merge the older versions into this thread. We'll look at it tomorrow.

Edit of the edit: In the meantime, players who have fallen afoul of my clumsy Flame Laser bug are encouraged to upgrade to v5.9.2 for compatibility reasons. Have fun and happy facemelting!