Invite friends (via Essential mod) for MineColonies and technologies (Create/Applied Energistics2/Ad Astra/Forgematica/Mekanism), fun transportation (Immersive Aircraft/Automobility/Waystones), more mobs (and Fresh Animations), guns, QOL, etc.

Immersive Tech modpack for friends and family, where you can invite others to your single player world. Includes automation, space travel, guns, cars, planes, many mobs and instantly deploying buildings too :).

Client-side modpack, with which you can join vanilla servers. Improves immersion and has many quality-of-life mods.