Links and Useful Resources

• Ethereum Homestead Documentation
• Ethereum Wiki
• Ethereum JSON-RPC specification
• Ethereum Yellow Paper on the GitHub repository
• Solidity docs
• Layout of variables in storage
• Ethereum tests contains lots of common tests for clients
• Etherscan is very useful for exploring blocks and transactions.
• Ethstats provides a useful network dashboard. There is also a dedicated Rinkeby testnet dashboard.
• Ethereum reddit