There are 2 repositories under roblox-library topic.
Curated list of useful Roblox development resources for your personal and team project.
A Data-Driven Networking Library, inspired by Bevy_Renet & BridgeNet2, made for ECS.
LibUsefulUtil is a pack of libraries designed to be expandable and easy to use in the Roblox development environment, it utilizes Rojo aswell.
A Minimal, Typed Future Implementation for Luau.
A library for creating Thread Pools to improve performance and reduce latency on Roblox.
A Typed Signal Implementation similar to RBXScriptSignal for Roblox.