Is there a service you used to do that? If so, could you please share? I am thinking of moving out in about a year and I would love to donate my belongings to

Is there a service you used to do that? If so, could you please share? I am thinking of moving out in about a year and I would love to donate my belongings to someone in less-developed world instead of donating it to places like Goodwill (and I'm afraid that they'll send most of my donation to landfill)