Hackathons can sometimes be a really streful event, so we have compiled the resources below in order to better enable you to tackle any problems you might have!
https://nyhackathons.com/tools/: An open-ended list of all tools from general tech tools to design and other sorts of inspiration
https://education.github.com/pack: Github's own list of tools they provide for free to students. Definitely check it out, they contain many resources which would traditionally cost a lot of money!
https://hack.mlh.io/learn/: MLH's start kits and guides that go through important tech stack information in detail
https://github.com/xasos/Hackathon-Resources: A GitHub repository on EVERYTHING hackathon related. Definitely, a comprehensive list if interested
https://github.com/Olanetsoft/awesome-hackathon-projects: If you ever find yourself in need of inspiration this contains some amazing hackathon projects that you can take a look at.
To summarize, ensure that you keep your project simple, it's better to have a working smaller product than a broken large product. Don't let that restrict your thinking though, so feel free to think big and I can guarantee these resources and mentors would be able to support you through the process!