Rerum is a mod that adds all the small features and changes that I would like to have in Minecraft. It's a vanilla-style mod and you can enable and disable the individual features in the config. It is also a collection of all my previous mods ported to 1.17. I decided to make them all into one mod instead of maintaining many small mods.
Items
Portable Nether
Adds a Nether Teleporter, with which you can teleport to and from the nether from anywhere without needing to build a portal. You can also create nether arrows with which you can teleport your friends and animals to the nether.
Boost Boots
Boost Boots are boots that, when you wear them enable you to double jump. They also let you boost with the elytra without the need for rockets.
Lava Container
With the Lava Container, you can pick up up to 64 blocks of lava. No need to fill your entire inventory with buckets!
Quality of Life Changes
Better Pick Block
It has always annoyed me how, when you pick a block, like dirt, because you need to fill a creeper hole, for example, your tools and weapons get replaced by that block.

So I changed it. With this feature, your tools, weapons, etc. won't be replaced if you pick block something. Also, there's a bonus feature: You can now pick block on stone to get cobblestone if you don't have any stone, and grass to get dirt. This is so you don't have to go into your inventory when you want to fill holes.
Which items aren't replaced and replacement items (like dirt for grass) can be configured
There's also a config file where you can configure which modules are activated.