Polkadot.js

Multiple products carry this name:

• The Javascript Node API
• Signer Browser Extension
• "Apps Wallet" - also known as the "Portal"

It was the original tool collection for Polkadot.

The API provides application developers the ability to query a node and interact with the Polkadot or Substrate chains using Javascript.

• URL: https://polkadot.js.org/
• Github Repo: https://github.com/polkadot-js/
• Docs: https://polkadot.js.org/docs/
• For more information on the Portal, visit Polkadot.js Portal