If no takers when I need them out, then either try to get used appliance dealer to buy (they like freebies in many cases) or donate to Goodwill Industries.

Knowing what little I know about the situation, I'd add a plan D: Hire a wrecking crew to demo the place and donate the land to the city.

Unless of course you have tons of money laying around to donate to people.....?

Charitable Donation?

Following that, I would like to make regular donations to help the homeless shelters in Ontario to provide meals.

They often pay market value or close to it, then you and future generations would be able to enjoy the land development-free.In a similar vein, sometimes with difficult parcels (which, admittedly, this one doesn't seem to be) you can donate the land to a similar organization and get a tax write-off for the assessed/appraised value.

This friend is the executor of the will, which states that all of the proceeds from the sale will be donated to a local university.

You should donate your time or money to as many organizations or groups you feel compelled to.

I intend to make a donation to Project Home later this year, after we pay our property taxes. 

If you pay him, you won't gain any goodwill, you'll just be donating to charity.