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.

This pack compiles several classes, with an emphasis on hybrid design. Not all classes are complete: the ones which I'm not satisfied with are marked as either INCOMPLETE or "in BETA".

The classes included in this pack are:
- The Transcendent Fist is an unarmed Psionic warrior, using a gem in his TK slot to hit with flexible energy types.
- The Storm Warden is a melee-and-ranged skirmisher with magical mobility and support spells.
- The Striker is a cunning and covert class, with a focus on delivering shock-and-awe thunderbolts from stealth.
- The Gravitic Infantry is a melee-focused Chronomancy user (formerly named the Heavy).
- The Creep is a stalker in the dark, cunning and covert in his hate.
- The Vector uses disease and debilitation to keep his foes at range while he snipes them to death.
- The Flenser is a Defiler whose knives debilitate and torture his victims.
- The Blood Mage is a Vim-based caster with a mild dip into staff-melee combat.
- ... and more!

(BETA) Shield Hero is an Adventurer who starts with heavy armor and a shield. Not very exciting unless you were annoyed about not being able to equip your Adventurer's shield right away.
(BETA) Prototype Hero is an Adventurer who starts with 1.3 mastery in every category. Not very useful for players, but it might be interesting for addon writers to spitball new category combinations.

(INCOMPLETE) The Flux Marauder is a Paradox thug, stealing time from his enemies.

x (Removed): The human-only Embers of Gerlyk are fire-using magical martial artists. Removed pending new content / 1.6 features.
x (Removed): The skeleton-only Fossils are geomantic martial artists. Removed pending new content / 1.6 features.

Adds Draconians as playable race, with their own starting area. This addon was updated and forked by Aura of the Dawn, in the absence of ajfluffy.

Second branch, due to upload system differences requring a new shortname.

They say that deep within the forests of The Gloom lies a mysterious hedge maze, expanding as far as the eye can see.
While most people are sane enough not to enter, those that do never come out the same, if at all.
The Hedge forever changes them... empowers them... to what end, nobody knows.
A Hedgeknight is a worthy foe, capable of laying wound upon wound on enemies, and inflicting them with the most dangerous of poisons.

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This addon adds in the Hedgeknight Class, a Two-Handed warrior who uses the power of 'The Hedge' to augment his power with various summons and buffs.

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Talents

Ivy

All talents in this tree revolve around summoning friendly Ivy, each of which has a different effect, and scales slightly differently.
All will have 15% of your max health, and all will have a Resist All rating equal to a certain stat. (Will be listed below.)
Using one talent in this tree will put every other talent in this tree on a 3 turn cooldown.

Each Ivy's effect is applied when you land a melee attack on an enemy that is also within melee range of an Ivy.
Doing so will kill the Ivy, apply it's effect, and restore 3 Equilibrium to you.

Additionally, all Ivy (and your Bush Guardian) are part of a Plant Network, that allows them to share damage with one another.

Poison Ivy

Resist All is equal to 50% of your poison resistance.
This Ivy will deal weapon Damage split between Nature and Poison damage.

Crippling Ivy

Resist All is equal to 50% of your physical save.
This Ivy will cripple the target, reducing melee, spellcasting and mind speed for 5 turns.

Razorleaf Ivy

Resist All is equal to 50% of your bleeding resistance.
This Ivy will deal weapon Damage split between Physical and Bleeding damage.

Medicinal Ivy

Resist All is equal to 50% of your heal mod.
This Ivy will heal your health.
Amount healed is equal to your constitution + 25% of your max health.

Thorns

Offers some basic combat moves, a little bit of mobility, and a sustain that greatly increases your damage potential in extended fights.
Also includes a passive that grants some immunities, as well as reducing the immunities of nearby enemies based on it's value.

Thorn Whip

Attack a nearby enemy within range 4 for Nature weapon damage.
If you hit, you pin them, and pull yourself to them.
If used while in melee range, also deals a high amount of Physical weapon damage.
Can be cast on an Ivy, which will refund your cost, and half your cooldown.
Higher talent levels allow you to control your landing.

Thorn Graze

Attack an enemy in melee range for Nature weapon damage.
Also deals a high amount of weapon damage split between Bleeding and Poison.
If used while your Bushy Friend is within melee range of your target, applies a regeneration effect onto your Bushy Friend.

Thorn Rose

Grants passive Pin, Poison, and Bleeding resistance.
Also passively reduces the Pin, Poison, and Bleeding resistance of nearby enemies based on this value.

Thorn Body

Sustain that grants passive Armor and Strength.
Also adds bonus Bleeding damage when hit in melee, and on weapon attacks.

Bush Guardian

A tree that revolves around a moderate damage pet, that uses him for mobility and damage options.

Bushy Beard

Passively grant yourself Constitution and Accuracy.
Sustain this talent to bring your Bushy Friend to the battlefield.
Your Bushy Friend's stats are based on your Willpower and Max Life, and he gains bonus Life Regen and Resist All for every Ivy on the field.

Bush Taunt

Requires your Bushy Friend to be on the battlefield.
Deals damage in a radius 1 around your Bushy Friend.
Taunts any enemies hit.

Bush to Bush

Requires your Bushy Friend to be on the battlefield.
Deals damage in a radius 1 around both yourself, and your Bushy friend.
You deal Physical damage, Bushy friend deals half Nature, half Bleeding.
If your Bushy Friend is more than 2 tiles away, you also jump near him.

Bush Whacker

Requires your Bushy Friend to be on the battlefield and within 2 tiles of yourself.
Kicks your Bushy Friend across the battlefield, dealing damage in a radius 1 around his landing position, and stunning targets hit.

Hedgecraft

A tree that revolves around using your control over the hedge to do weave 'Impossible' feats.

One With the Hedge

Link yourself into your Plant Network, sharing and receiving damage though it.
Talent points reduce the values you give and recieve.

Hedgify

Empower your weapon with the very power of the Hedge itself, and attack all targets within a range of 3 for half Nature, half Poison damage.
Confuses all targets hit.
With One with the Hedge sustained, this talent's cooldown is reduced to 4, and it additionally heals all allies within range.

Hedge Portal

Step 'through' the Hedge to your target location, gaining bonus Armor, Defense, and Resist All for a few turns.
With One with the Hedge sustained, this talent requires you to target a friendly Ivy for the teleport(which will die), but it's cost and cooldown are removed.

Hedge Grasp

Pull in a nearby enemy with the power of the hedge, pinning and blinding them.
With One with the Hedge sustained, if your Bushy Friend is on the field, he'll pin and blind all enemies around his current position.

Petals

A tree that revolves around low to mid ranged melee combat.

Petal Beam

Attack an enemy at short range with a Nature Weapon attack.
If the attack hits, you will deal additional damage to all enemies near your main target.

Petal Swarm

Attack an enemy at short to medium range with a Nature Weapon attack.
If the attack hits, you Stun them.
If the attack misses, or the Stun fails, you instead Daze them. This Daze cannot be resisted.

Petal Implosion

Attack an enemy in melee range with a high damage Nature Weapon attack.
This attack will than knock you back a small to medium distance.

Petal Dance

Sustain this talent to become one with your Petals.
While sustained, every single Weapon attack you do grants you a Petal charge.
If the enemy is in melee range, they are additionally knocked back 1 tile.
These petal charges will be expended whenever you take more than 5% of your max life in damage, and will reduce the damage.
You lose 1 charge per turn.
Damaging Ivy grant 2 charges each, while non damaging Ivy grant 0 charges.

Removes all the unwanted categories from the level up screen so it runs smoothly.
Has an interface to allow you to select which categories are displayed.
Compatible with other addon categories.

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!