Drowning gets you good items but walking the whole big towns searching for rares is tedious.
Enter Round'em Up, which lines them nicely for you to see at once.
Changes are made only to towns where drowning is possible.
Good synergy with Marson's Character Recycler which lets you restart by pressing Ctrl-Alt-Shift-L instead of suiciding.

It works by overloading the town file with changed npc generation boundaries.

I'm a programming noob (or even less), so go easy on me. There should be no errors though, only changes are 4 number values for each town.

PS. I can't help but feel there was a better way of doing this. Sorry this addon is so heavy.

Makes certain locations accessible to all characters.

Removes start scumming and drowning and replaces them with rebalance changes.

Full details in discussion thread.

planned v5 - remove all artifact generation from shops, figure out how to add phy/men wilds

v4 - added steamsaw/guns to old man

v3 - added dispersion (last hope), track (derth), burrow (shatur) and short staff (angolwen) to shops

v2 - rebalanced the old man randart power/egos, now equivalent to what would usually drop from a boss on the relevant difficulties, insane players get 2 tier 3s, madness get 2 tier 5s

Is more generous with talents, types and stat points for each level gained.
Birth stats remain unchanged.
5 stat points per level, up 2 from 2.
2 talent points per level ( 3 if a multiple of 5 ), 1 ( 2 ) up from 1 ( 2 ).
2 generic points per level ( 1 if a multiple of 5 ), 1 ( 1 ) up from 1 ( 0 ).
4(!) category points per instance at levels 10, 20 and 36 ( and for every 30 levels after if that's a thing ), up 3 from 1.
2 prodigies at levels 30 and 42 ( up from 1 ). Additionally, +1 prodigies every 50 levels ( so 5 total at 50, and 1 more every 50 levels thereafter ).

Version 3.0: Compatible with ToME 1.5.0

This addon supports game play for character levels higher than 50, primarily for the infinite dungeon (I.D.). This implements a number of subtle changes, rescaling game mechanics and balance for character levels above 50 in the Maj'Eyal, Infinite, and Arena campaigns for ToME. The intent is to make it possible (though certainly not easy) to reach level 500 of the Infinite Dungeon. This is not a nerf or a buff to game difficulty per se, but, rather, an extension of the well-balanced game play from the Maj'Eyal campaign to higher levels.

Some talents and status effects have been adjusted to accommodate the higher character levels possible. You can see a summary of these by checking the "Infinite500" tab in Game Options.

Once a character enters the I.D., the level 50 cap is removed and normal stats-per-level progression is enabled from level 51 onward. The limit on how high primary stats may be trained is removed (limited by character level as normal) and dependent computed value limits are also appropriately increased. No additional Prodigies are gained automatically after level 50. (Note that additional category points and (rarely) Prodigies can be gained by completing I.D. challenges.) Talent mastery levels can be improved more than once, and talent levels are unlearnable as normal in the I.D.

NPC levels in the I.D. have been adjusted to be compatible with higher game difficulty settings.

Most monsters and bosses from the Maj'Eyal campaign are imported into the I.D. along with their respective unique drops.

Traps have been added back to the I.D.

Isolated shops can appear randomly in the I.D. There is guaranteed to be at least one shop on level 1, and they become more common for the first few levels, and then more rare with depth.

Random escorts may be randomly generated on each level in the I.D. unless a challenge has been started, until the normal number (9) have been attempted.

The lichform quest is completed in the I.D. with a new random drop instead of automatically being completed at the appropriate step. There is a new greater vault in the I.D. that affects this quest.

The Corruption/Hexes tree can be learned from a new random drop.

Most major events from the Maj'Eyal campaign are enabled in the I.D., and there is a new event that can award the cursed-aura tree.

Undead characters starting in the I.D. begin with an artefact cloak. This is similar to the Cloak of Deception, but its stats scale with character level and it can spawn randomly for other characters.

This addon incorporates some modified game mechanics:
The ability to shrug off critical hits has been changed. Instead of using the percent value to ignore crits completely, it reduces the crit multiplier by the same amount to a minimum of 100%.

Modified checkHit and checkHitOld functions are employed that allow for wider level differences between opponents (see http://forums.te4.org/viewtopic.php?f=36&t=35229).
Saving throws have been modified slightly to make them more effective at reducing the duration of status effects you fail to save against. (See http://forums.te4.org/viewtopic.php?f=36&t=36715 for details.)

Things planned for the future: scaling of world artefacts with character level, map effects with dungeon level.

CORE CODE CHANGES
Key code changes appear in:

Engine:
engine\generator\map\Static.lua
engine\interface\ActorStats.lua
engine\interface\ActorTalents.lua

TOME Module:
mod\load.lua
mod\resolvers.lua
mod\class\Actor.lua
mod\class\Game.lua
mod\class\GameState.lua
mod\class\Object.lua
mod\class\Player.lua
mod\class\interface\Combat.lua
mod\class\interface\TooltipsData.lua
mod\dialogs\LevelupDialog.lua
data\birth\worlds.lua
data\general\events\damp-cave.lua
data\general\events\drake-cave.lua
data\general\events\fearscape-portal.lua
data\general\events\naga-portal.lua
data\general\events\old-battle-field.lua
data\general\events\rat-lich.lua
data\general\objects\world-artifacts.lua
data\general\objects\world-artifacts-far-east.lua
data\damage_types.lua
data\quests\lichform.lua
data\rooms\greater_vault.lua
data\zones\infinite-dungeon\events.lua
data\zones\infinite-dungeon\npcs.lua
data\zones\infinite-dungeon\objects.lua
data\zones\infinite-dungeon\zone.lua
data\zones\ruined-dungeon\grids.lua

Other addons that affect these files might not be compatible.

Berserker punching orcs to death? Temporal Warden using guns? Why is this Sawbutcher using Mindstars? This mod removes some restrictions to let almost every talent work with almost any weapon.

This mod is currently under development, so beware of potential problems and please report any bugs or errors here or preferably in the discussion thread. Suggestions are also welcome.

More details and technical info can be found in the thread.

This simple addon removes the new "one use per zone level" limitation of the See The Threads (Chronomancy/Chronomancy) talent.

After the update which severely limited this talent and removed Precognition' ability of splitting the timeline completely, I felt like a huge and fun part of chronomancy was taken away (even though it aligned better with balancing). Recently, I've started to dabble in game's code and this addon is my first, long-desired creation. Hopefully, someday I'll be able to make an addon for Precognition too, although this would be much more difficult than this simple tweak.

With all that said, please enjoy this addon to your heart's content. :3

---
This addon should be safe to use without starting a new game, and even make See The Threads work on levels where it was already used before the installation.