Using free alternate to Planet

[AlexandreBorowczyk]

Hi,

I'm running in the following issue while tying to activate the product:
NoPermission: {"general": [{"message": "Download quota has been exceeded."}], "field": {}}

I guess the terms of use of Planet's free trial must be different from we this code was written.
I was wondering if there other free alternative and what to do to use them. I'm new the the GIS field so if someone could point me to some good online resources I would greatly appreciate it. To give you more context: I would be interested to layer topological, land use and imagery data, draw some shape to either mark location, mark feature or also overwrite the land use data.

Thanks