I am building a data base in Airtable of plants that are hardy to zone 3 that I have purchased (seeds) for my eco-gardening project in the North Shore region of Quebec (Minganie). I don't know if all of these plants will work in my area, but I'm going to found out!
Airtable is very user-friendly and it allows me to invite collaborators. If you are gardening in Zone 3 and would like to view the database (work in progress) and share your experience with / comments on the various plants, message me and I can give you an access link.
pfaf.org has an awesome database that can be filtered by hardiness zone. It can also be filtered by many other useful fields like edibility and nitrogen fixing.
Good luck with your project!