This is a evolving list of tutorials on development for the NEO ecosystem

Dev Environment Setup

https://steemit.com/neo/@z0yo/quick-setup-neo-private-net-w-gas

Hello World Smart Contract

https://steemit.com/neo/@z0yo/neo-smart-contracts-tutorial-helloworld

Smart Contract: Build & Test

https://steemit.com/neo/@z0yo/neo-smart-contracts-build-and-test

NEO Smart Contracts: Workflow Improvements

https://steemit.com/neo/@z0yo/neo-smart-contracts-workflow-improvements