PixelGuys/Cubyz 0.4.1 on GitHub

Highlights

Permission Groups
Commands can be run from the server console (Linux)
Player whitelisting and banning
Servers can be restarted seamlessly (without kicking online players), can be used to change some of the per-world assets
New procedural tool textures

Swords can break vegetation without dropping it
Days are slightly longer than nights, a freshly created world starts at the beginning of the day, not in the middle, same applies to /time

Permission Groups (by default everyone can use /avatar to change their model)
Commands can be run from the server console (Linux)
progress on the vulkan rewrite
World spawn can no longer be in the air
Fixed potential data loss on server restart when a player left and rejoined the server
Several crashes were fixed

Bushlands overhaul
more surface cave biomes
Cold tall mountains
Savannah Fields
Javantique (rare)
Modern art and glass forest biomes are rarer to match the chance of the other rare biomes
Phantasmal biomes are no longer in the root

/server restart can be used to restart the headless server and reload connected players, can be used to reload per-world assets (note: Changing biomes may trigger LOD regeneration, which can take quite a while for large worlds)
/group to manage permission groups
/help only shows commands that you have permission to use
/tp now allows player to player teleportation as well as setting player rotation
/count counts blocks by type in the selection box
/whitelist to enable/disable it and to add/block players from the whitelist (blocked players remain blocked when the whitelist is disabled), all players that were online in the past are automatically added to the whitelist

Shift-clicking for the bag
Snela player model
Player heads now rotate based on the view direction
Connecting to multiplayer no longer freezes the game and you can cancel it
Procedural tools now have a dark outline like all other items
Log items don't look like soil anymore
When hovering an item and pressing a number it will swap the item with the corresponding hotbar slot
small improvements to account creation
Fog can be placed on other Fog blocks in creative
No shadows for icon buttons
Glass has a subtle dark fog
Item drops are now properly saved, previously they were lost on crashes
Fixed floaty player animation caused by incorrect time difference
Opening the system explorer (when clicking on the folder icon in world selection) no longer freezes the game, as observed on some systems

New callback replace_block_type to replace a block while keeping the rotation mode data
Ores can be restriced to only spawn in blocks with specific tags

In all biomes, rename properties to climate
Rename entityModels folder to entity_models
You need to convert material colors from the old hex list to a n×2 texture. (see #3463 (comment) for a script to auto-convert)
- The texture also requires the new outline colors for the procedural tool outline
You can remove the drops field in the decay block update, leaf decay no longer allows for custom block drops, it now drops the same items as broken by hand
Rename usage of the voidStone tag to voidstone
Watch out for errors, some IDs were renamed

@careeoki for suffering through the new outline colorings as well as adding all the new biomes and blocks
@Wunka for finishing the Command refactor, permission groups, and for not being shy to jump into new topics, like helping out with networking and vulkan
@TyrrelMeter for tall mountains and putting more stuff in the caves
@yel0h for adding the tool outline, whitelisting, and various smaller changes
@tillpp despite leaving the the team, we'll keep adding your old PRs, this time /server restart (which caused me so many issues... glad we didn't rush it into 0.3.0)
@RanPix for head rotation (still hoping for particles)
@DellieDelta for more blockdrop changes
@Argmaster for making logs look like logs, and for further investigating ECS
And thanks to everyone else who contributed or helped out in the rest of the community!