How to get access to PAN Protocol Smart Contract on Ethereum for developers.
Here is a lightweight Java and Android library for integration with Ethereum clients https://github.com/web3j/web3j
Here is a PHP interface to Ethereum JSON-RPC API. Fully typed Web3 for PHP 7.X https://github.com/digitaldonkey/ethereum-php
Here is a python interface for interacting with the Ethereum blockchain and ecosystem https://github.com/ethereum/web3.py
You will likely need to install two libraries for Ruby: