polkadot-js / apps

Basic Polkadot/Substrate UI for interacting with a Polkadot and Substrate node. This is the main user-facing application, allowing access to all features available on Substrate chains.

subsquid / squid-sdk

TypeScript ETL toolkit for indexing Ethereum, Solana, and Substrate data, sourced from SQD Network.

polkadot-js / api

Promise and RxJS APIs around Polkadot and Substrate based chains via RPC calls. It is dynamically generated based on what the Substrate runtime provides in terms of metadata.

polkadot-js / extension

Simple browser extension for managing Polkadot and Substrate network accounts in a browser. Allows the signing of extrinsics using these accounts. Also provides a simple interface for compliant extensions for dapps.

moonbeam-foundation / moonbeam

An Ethereum-compatible smart contract parachain on Polkadot

agent-substrate / always-on-agent

Run always-on messaging agents on Agent Substrate. A multi-tenant gateway holds the channel connections while each conversation runs as a suspendable actor, so presence stays warm and cognition suspends to reclaim compute. Reference implementation built on OpenClaw.