“The Open Source Seed Initiative (OSSI) is dedicated to maintaining fair and open access to plant genetic resources worldwide.”

Very nice project, basically a fork of the PFAF-Database but editable and focused on community and practical use.

Mixed Licences

A registered charity that compiles a database featuring over 7500 plants with a focus on perenials.
They have names, images, uses, etc. It’s quite amazing.

“Plant Buddies is an easy to use tool that helps you with companion planting.”