Collection of Mods

yes, a good site but most mods there are pretty much cheats or texture changes

there are some mods which help with performance problems by disabling post processing
so they might also be an option

the most useful mod in my eyes is this one
Fast Actions - No Man's Sky Mods

Ok here a PC has more advantages than a PS4. I need to wait until they would bring such features with regular updates
And indeed the long waiting times are somewhat disturbing.

there is also a mod that shortens the wait time of dialogues
but I wouldnt really advice to use it

in short... it requires a tool called NMSE Launcher to inject a dll in order to run
and while that mod works in some situations with npcs it simply does not work with terminals where you have to solve mathematical riddles.
There the answers are no longer displayed.

With other words it clearly breaks the game.

Generally the modding support is nice but on the other side its one of the major reasons why I cant really expect this game to get a real MP version.
As long players can easily cheat and mod the game, multiplayer wont work.

Ok, here are the (in my eyes) must useful mods and tools.

Fast Action
It removes the need to keep the every key/button pressed for multiple seconds to trigger an effect. Thats a clear gameplay improvement.
Fast Actions - No Mans Sky Mods

Shutup
This mod disables specific audio warnings which become very annoying. Its pretty stupid to get a warning about low health if your health decreased to 75% (thats not low).
ShutUp - disable certain annoying audio warnings - No Mans Sky Mods

Magic Speed
The walking speed in the game is terrible. That mod speeds it up.
Magic Speed - No Mans Sky Mods

Savegame Manager
That might help you to store more than 2 saves in case of discoveries which you want to store.
No Man's SaveGame Manager - No Mans Sky Mods

Seed Changer
This tool allows you to change the look of your multitool and your ship without changing its class and stats.
Its a randomly generated seed which replaces the settings in your savegame.
Seed Changer (ship,multitool changer) - No Mans Sky Mods

No Mans Sky Manager
A simple mod manager.
No Man's Sky Manager - No Mans Sky Mods

Reduce shadow distance
Like the name implies it reduces the distance at which shadows are drawn. This gives a good FPS boost at the cost of good look.
Reduce Shadows Distance - No Mans Sky Mods

Location Manager
This tool allows you to store interesting locations so you can visit them again later. By default the game is terrible at storing such stuff. Its pretty hard to return to a place that you have visited in the past because the navigation on the galaxy map is awful.
NMS Location Manager (Save/Share Locations and Teleport) - No Mans Sky Mods

LowFlight
This mod allows you to fly as low as you want. There is no limitation anymore.
This way you can dock on landing pads with ease. But you have to be careful because now you can crash into everything.
My first try went a bit wrong... I was approaching a planet but didnt slow down before I hit the ground and against all odds flew into a cave. Getting out of it without destroying the ship wasnt that easy.
LowFlight by Hytek (PACKED) - No Mans Sky Mods

BetterGrain & ultra high mod
If your PC can run it... this will clearly improve the graphcis.
NMS - BetterGrain&Ultra High Mod - No Mans Sky Mods

Multitool revamp
That one changes the textures of the multitool display to something more detailed.
Multitool HUD Revamped - No Mans Sky Mods

Deep Space
The Deep space mod makes adjustments to how the game renders space nebulas, colors on planets and post processing filters. If you are looking for black space and less reddish planets this mod is worth a try.
DEEP SPACE - No Mans Sky Mods

Immersive Space
Just like the deep space mod it aims for more realistic looking environments.
You get a dark space. But unlike deep space there are background nebulas left and you still have lots of the post processing stuff active.
Immersive Space - No Mans Sky Mods