Harmony Node Deployment Guide - Harmony provides a complete node deployment guide at nodes.harmony.one
Harmony Command Line Interface Documentation - Harmony Command Line Interface can be used to manage operational interactions with the Harmony Blockchain, documentation can be found here.
Harmony HTTP API Documentation - Harmony provides robust API integration initially modelled of Ethereum’s web3 and enhanced to support the nuances of Harmonys highly scalable and performant platform, documentation can be found here.
Harmony SDK - Harmony provides DApp developers with a suite of npm modules the cornerstone of which is @harmonyjs/core, Harmony's equivalent of Ethereum web3, npm modules can be found here with the codebase here and draft documentation here.
Harmony Sending Transaction Guide - Harmony provides a number of tutorials including a guide to sending transactions to Harmony, tutorials can be found here.
Harmony Wallet Management Tools - Wallet management tools are available the Harmony CLI, which is documented here.
Harmony Explorer - Harmony provides a blockchain explorer to review accounts, transactions, blocks, shards and node information, it can be found here.