OrbitDB

Alloy is a set of libraries that provides types and RPC client implementations for Ethereum.

eRPC sits in front of your RPC providers to add caching, failover, and routing tuned for read-heavy workloads like dashboards, indexers, and multi-tenant backends.

An Ethereum Node built to run in Browser, Bun, Deno, and Node.js

Stereum is a GUI-driven installer for syncing Ethereum and Optimism nodes locally and exposing your own JSON-RPC and websocket endpoints once blocks are current.

https://x.com/0xbloctopusBloctopus is building open-source dev tooling using Kurtosis that can spin up any web3 infrastructure on-demand. Through various kurtosis packages, we already support many blockchains, cross-chain protocols, oracles, wallet infra, and indexers.

A non-blocking UTP library in Java that avoids defining the transportation layer. Ready to be used using UDP or discv5.