The Dread Necromancer is a complete reimagining of Necromancer - while it shares many of the themes and names, and has a few talents retained, it's effectively an entirely new take on the class.
It still uses mana and souls, but souls behave quite differently. You can store up to 5, and regenerate and can retain up to 3 out of combat. Damage dealt by you and your minions grant soul fragments, and you gain a soul when you obtain a sufficient amount. Souls are used both to summon minions, and for your more powerful spells.
Depending on your categories chosen you can have powerful, temporary minions, weaker mass minions that last indefinitely in combat, or a single minion with customization options.

See the forum thread for full details.

More Boss!
This addon introduce 8 new bosses to the game, with their different fighting styles and special abilities.
You will see the detailed introduction about those bosses and their special abilities in the forum post.
This addon is still in Alpha test, so it is expected to have many bugs and really unbalanced settings. Hope to hear your feedbacks!

Important: this addon will have no effect if left unconfigured! Please read the description!

Recommended settings:

hit escape -> video options

• Requested FPS: 30
• Resting divider: 10
• Running divider: 5

Description:

Enables faster run/resting by use of FPS dividers.

These dividers simply divide the game's requested FPS by their respective values while resting or running. After starting a new game or loading a saved character, configure this addon by hitting escape -> video options. Setting these dividers to something greater than one can substantially reduce the amount of time required to finish resting/running on older computers.

Just be careful when resting on an escort mission...

Changelog:

See the forum discussion for the changelog.

Improves the "Press <control> to compare" functionality for objects.  New features:

• When pressing <control>, a note at the top of the text will tell you which object in your equipment is being compared against the current item.
• While holding <control>, tapping <shift> will cycle through the objects in your equipment that the current item can be compared to.  Useful when wearing two rings, dual-wielding, or using the second weapon set.
• (new in v3) Runes and inscriptions in your inventory or store inventories can be compared via <control> to corresponding inscriptions on your body.

Also available as part of the ZOmnibus Addon Pack and ZOmnibus Lite.

Adds 3 new dungeons to the world map (blood soaked ruins, infested ruins & wolfmire) these dungeons will have unique boss and lore spawns. 8 new bosses have been added that will spawn in the new dungeons (they will also spawn in Infinite Dungeon)

Over time I will be adding more dungeons to explore and bosses to defeat! I also have plans to create new mobs and mob variations, create unique artifacts and eventually implement a quest system to reward you for defeating the new bosses (since quests are not yet implemented bosses will drop gold upon death.

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IMPORTANT: I am unable to respond to comments on this site as my comments keep getting blocked as spam! If you have issues/bugs/requests you will need to post your comment on the STEAM Workshop addon page here: https://steamcommunity.com/sharedfiles/filedetails/?id=1769451307 So I can see/respond to you there.
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Lowers cost for mastery upgrades to half a category point, making mastery upgrades a much better option than they are now.

A new class, a Celestial summoner who draws on the powers of Shandral's other planets to call up elementals.
Their basic trees summon and support Fire, Ice, and Lightning Elementals, as well as providing utility effects.
Their unlockable advanced trees rain down Meteors and twist Time Elementals into being.
They start with Chants, and a new tree in the vein of chants and hymns. They can unlock Celestial Light.

Their main resource is negative energy, which they generate by summoning and some other spells, and spent by others.

This mod should be compatible with just about everything.
Superloads

• data/talents/uber/mag to support Blighted Summoning
• mod/class/interface/combat.lua to support Glacial Path's speed boost.

Sounds remixed from samples by Mike Koenig under CC-BY 3.0

Primary Features:
Two new Archmage style classes; Arcanist and Elementist.
One new Enchanter class.
Some extra talents for Alchemist.
Lots of new artifacts.
Artifact gems are more interesting to attach to golems.
Crystal Focus/Heart items can be deconstructed to recover the gem.
Angolwen Academy: Get training in the Arcane here.
3 new runes.
Two new item types with unique egos: Ritual Blades and Wardstones.

Arcanist Features:
Like Archmage, but also starts with temporal, meta and nightfall unlocked, and no elemental categories.
Has two unique categories; High magic and Void magic.
Can also unlock Illusion, Distortion, Power and Morph.

Elementist Features:
Like Archmage, but only elemental categories.
Has three unique categories; Elementalism, Corrupted Elements and Elemental Fusion.

Enchanter Features:
Apply a variety of enchantments to your equipment.
Dabble in safe and unsafe hedge magic.
Defeat monsters with your prowess with a staff.

Archmage Features:
1 new category containing 8 arcane/elemental combo spells.

Alchemist Features:
Altered Alchemists Guild quest.
Two new unique categories: Poison Alchemy and Metal Alchemy.
They also get access to Mana Alchemy and Herbalism.

Adds the High Guard, a mage subclass. The High Guard is a melee fighter with mid-range spells who can wield any staff in one hand and favors shields in the offhand.
Primary stats are Magic and Strength. All talents are spells and use only mana. Attacks with both staff and shield, with nearly all attacks (save for bumps) dealing the damage type your staff is currently alinged to.

Unique Talents:

Spell/Battlemage
Talents for fighting and defending with your staff and shield.

Spell/Magical Assualt
Talents for assualting your foes.

Spell/Phasing
Talents for battle mobility and defense.

Spell/Battle Channeling
Talents for combat utility.

Spell/Sorcerous Might (high level)
Store power in your shield to empower yourself.

Spell/Mage Adept (high level)
Gain greater control of magic and learn damaging spells.

Spell/Medic (generic)
Defense and utility.

Base Talents:

Technique/Combat Training (1.3)
Spell/Staff Combat (1.3)
Cunning/Survival (1.0)

See the forum thread full talent details.

Talent icons from https://game-icons.net
Class icon from https://opengameart.org/content/painterly-spell-icons-part-1

Adds the White Monk, a warrior subclass.

The White Monk wields no arms, instead using intense focus and training to turn their body into a weapon. They fend off enemy blows with their immense willpower and can preform healing and regenerative rites. Primary stats are Dexterity and Willpower. White Monks have the unique ability to project unarmed melee attacks at a distance, with talents that allow them to strike many targets in a area, as well. White Monks have a base damage modifier for hand gear of 60% Dex and 60% Wil, and gain some of the same benefits to unarmed attacks as Brawlers.

Includes seven new talent trees and incorporates a few existing trees from Warrior and Rogue classes.

Rending - Attack your foes from afar and sap their energy.

Mending - Heal and cleanse yourself and even prepare a rite that can ward off death itself.

Fending (generic) - Ward off enemy assaults, directing some damage to your stamina pool.

Agile Combatant - Move across the battlefield with unmatched agility.

Martial Arts - Master the art of unarmed fighting and gain bonus strikes from your attacks.

Black Belt (locked) - Learn advanced fighting techniques to cripple your foes and react with finely honed reflexes.

Transcending(locked) - Directly manipulate your foes' spirits to sap their energy and learn to project your spirit to assail all nearby foes.

Follow one of the Six Ways with a set of class evolutions for the White Monk:

Way of the Rushing Bull

Way of the Flying Arrow

Way of the Open Palm

Way of the Arcane Flow

Way of the Transcendent Spirit

Way of the Hidden Viper

Full details in the forum thread.

Quality of Life improvements for resting and auto-exploring.

v3.5.0 *** FOR ToME v1.6.5 ***
This is a fork (with permission) of Marson's auto-explore and rest tweaks. It includes as well C.Lowe/CaptainTrip's improvements as well. It does not include, but recommends also using Johnny0's Faster RRE add-on for even better rest and auto-explore experience. This add-on contains numerous Quality of Life improvements designed to make resting and auto-exploring easier to use, brings the add-on overall up to being compatible with 1.6.x, and generally seeks to remove it being more optimal to do timed rests or manual recovery (particularly to help higher difficulty level and players without Faster RRE). Cleaned up feature list in this take, to make it easier to see what it does.

It is recommended to turn off Marson's Rest and Auto-Explore as well as C.Lowe's Rest Tweaks if using. This addon is meant to include all of them.

Latest Update Notes:
• Changed steam sustain behavior to match current gameplay. Before sustains tended to shut off when available resource was 0, now they don't seem to do so. This will now only turn off sustains that drain steam if steam is going below 0, so as to get to a steady finish state.
• Fix minor bug where stealth enabling was always on if you had it.
• Added new option to ignore quest members when resting or exploring. It defaults to off but for those folks that know they want to ignore those quest allies and rest a bit.

Existing Features:
• removed First Sighting and Reset on Rest. Someone can patch them in if they'd like it back, but I'm not really keeping them alive.
• Fixed actor bugs causing Elemental Surge to never reset. Thanks Reca♥den.
• Fixed bug with Paradox Spacetime Tuning from 1.5.5. This may rebreak posessors with paradox, hard to kinda test.
• Mostly verified working on 1.6.0
• Compatibility with restart sustains. Thanks zizzo.
• When resting, it will check for infusions and runes that could be used to accelerate HP, Mana, or Equilibrium (via Ancestral Life or Meditation) recovery. If the acceleration appears significant, it will use them, rotating from first available infusion or rune outward. In experiment, I found this often reduced rest turn time by 50-80 percent, improving the more drained the resource was. Particularly helpful for Mana, as it avoids trade-off advantages of short term resting (for increased mana regen) + rune use by just handling that more optimal play for you automatically without breaking rest.
• Support for steam implants, with usual checkboxes. This may not always be faster based on steam sustains that may disable after the initial round of rest and steam implants having very long cooldowns (30+ turns) and steam's resource max being pretty small. It tries to be conservative on that, so will most likely help for cases where your functional steam regen rate is < 2.00 and never activate for things much above it. I found I was often getting 5-20 steam per turn, which makes the implant support useless.
• Supports for medical healing salve injectors. Cooldown measurements are a bit odd here, since they can range from 5-20 depending on injector. Went with 10 as a happy medium for how many turns of natural regen is considered to be equal to the cooldown cost of using it.
• Adding support to auto-stealth if available and not stealthed.
• Option for ignoring small damage when moving and resting, basically if it is <5%, it will ignore it by default, prevent small DoTs from preventing rest.
• Options added to control whether or not to use inscriptions to accelerate recovery of things.
• Fixes a ToME bug that can cause autoexplore or running to move only a single square and hang if used immediately after killing an enemy.
• Lore discovery will only stop autoexplore if it triggers a popup.
• Autoexplore will ignore Exploratory/Infinite Farportal return portals until the entire level has been explored.
• Ignores special terrain features such as Font of Healing after they are first discovered.
• Ignores open chests and alt Maze floor cracks.
• Rest and AE ask for confirmation if you have an escort in your party.
• Ignore already activated pedestals.
• Checks for and waits on any rechargeable items.
• Checks for and reloads any ammo in offhand quiver.
• Waits for cooldowns of talents set to auto-use.
• Waits for depleted air to replenish.
• Combines all checks into a single instance of rest, rather than having cooldowns etc. require a second resting phase.

Determines how auto-explore and running respond to telepathy, including mouse moves. Regardless of the setting, hostiles seen via telepathy will not halt resting or the Rod of Recall, nor trigger automated talents. Unique or powerful monsters (rank > 3) will always trigger a halt to running when they are spotted via telepathy for any mode except 'Original'.

Available modes:
• 'Always Viligant' always stops running when a hostile creature is seen via telepathy.
• 'Original' is standard ToME auto-explore behavior, which ignores telepathy when running or auto-exploring.

• Compatible with ToME v1.6.0

Notes:
Folks who have helped with bugfixes over the years:
Reca♥den
St_ranger_er
zizzo

• Telepathy will not prevent auto-exploring the way normal sight will. If a halt is triggered by telepathy, hitting auto-explore again will move you at least one more square in the direction of the auto-explore path. If in 'Always Viligant' mode and a hostile is within telepathic sight (but not normal sight), you will auto-explore in 1 square per keypress increments.

Content is modular and various sections can be disabled via the options.

Primary Features
Druid class:
Uncast spells to produce nature based magical effects.
Its an agile nature mage, but can be played as a fighter/mage hybrid, or as a summoner hybrid.
Uses staves, alchemist gems and equilibrium.
Werebeast Class:
Werebeast fits somewhere between Cursed and Wyrmic, with a touch of Rogue thrown in.
Flavour is you have been cursed by nature's hate at those who harm it.
Can be played with conventional weapons or dual mindstars, stealthy or heavy.
Uses both Hate and Equilibrium.
Woodsman Class:
Archery, Summoning and Traps.
Use whatever you need to survive.
Summoner:
A full rework is available.
Allows you to command your critters to attack or defend.
Wyrmic:
A few talents improved and many new categories.
General:
Loads of nature based artifacts.
A few of new inscriptions.
Oozemancer can get the Wild-gift/Symbiant category.

Druid Info

Zigur:
As Druid's use spells they cannot become a Zigur follower, as this would make all their talents unusable.
However, you can still attempt to join Zigur, you might get something special instead.

Categories:
Wild-gift/Land
Wild-gift/Seas
Wild-gift/Winds
Wild-gift/Woodland
Wild-gift/Minerals
Wild-gift/Weather
Wild-gift/Moss
Wild-gift/Volcanism
Wild-gift/Boreal
Wild-gift/Jungle
Wild-gift/Natural Cycles
Wild-gift/Eyal's Embrace
Spell/Staff Combat
Cunning/Herbalism
Wild-gift/Call

Werebeast Info

Categories:
Wild-curse/Wolf Aspect
Wild-curse/Treant Aspect
Wild-curse/Shark Aspect
Wild-curse/Eagle Aspect
Wild-curse/Ritch Aspect
Wild-curse/Silent Hunter
Wild-curse/Psiclaws
Wild-curse/Snake Aspect
Wild-curse/TigerAspect
Wild-curse/Bear Aspect
Wild-curse/Croc Aspect
Wild-curse/Fungus Aspect
Cursed/Rampage
Cursed/Predator
Wild-gift/Hunter

Woodsman Info

Categories:
Cunning/Stealth
Cunning/Trapping
Cunning/Woodcraft
Cunning/Poisons
Wild-gift/Summon-melee
Wild-gift/Summon-utility
Wild-gift/Summon-commands
Technique/Marksmanship
Technique/Archery-utility
Technique/Bow-fexibility
Technique/Combat-Training
Cunning/Survival
Cunning/Herbalism
Wild-gift/Hunter

Summoner Info

Two new summonable critters and revised summoning categories.

New Categories:
Wild-gift/Summon-commands
Wild-gift/Summon-techniques
Wild-gift/Symbiant

Wyrmic Info

New Categories:
Wild-gift/Sea Drake Aspect
Wild-gift/Wind Drake Aspect
Wild-gift/Hunter
Wild-gift/Wild Drake Aspect
Chronomancy/Blink Drake Aspect
Corruption/Blood Drake Aspect

Talent changes:
Lightning Speed now converts your damage to lightning for your next hit.
Wing Buffet replaced with Ember Scales: a flamey aura sustain.