1. Developer portal for ICON's tech stack and information on deploying to ICON network: https://docs.icon.community/

2. ICON community github: https://github.com/icon-community

3. Hackathon twitter, ICON twitter, ICON Dev Discord

4. Development framework for developing, testing and deploying ICON smart contracts: Drogon

5. ICON NFT marketplace: Craft

6. ICON Unity SDK: https://github.com/FOMOmental/ICON-Unity-SDK