Homemade goods such as blankets, sewn toys and other crafty bits. You could donate these items to the charities themselves, or sell them on local selling sites (such as Facebook Marketplace) and donate the money raised.
Plenty of us forget that one of the simplest ways of giving to charity without parting with cash is to donate possessions. So when you do your spring clean, take the goods to your local charity shop. Host a clothing drive ahead of the freezing winter temperatures to support and protect community members in need.