Below are what i found from websites for DONATION. Hope it help you and others!
DonationTown (Not Singapore)
Free Nationwide Donation Pick up. Schedule a Charity Donation
Pass It On
Post items you want to donate to this website. You can be sure they will be matched up to those truly in need as the website is accessed only by social workers who seek specific items for their clients. Be aware that each item must be posted individually and the matching may take up to two weeks.