AlfinoLib is a library I use in all of my mods - it is a combination of the old Alfino's Datapacks/Alfino's Networking.
The library contains abstractions for datapacks and networking (the big win is stream codec standardisation!) - making version maintenance between Forge 1.20.1, NeoForge 1.21.1, and NeoForge 26.1 (hopefully) a bit easier :)
There are more planned abstractions in the future too, with the aim of making maintaining multiple versions easier.