2 seater couch

Google 'Petit rien'. Register your good and a picture on their website. They will call and fix an appointment when they will come to pick it up for free.

Register for free and post it on Freecycle: https://groups.freecycle.org/group/Brussels_Freecycle/posts/all

Salvation Army. They have a second hand shop where they sell on stuff for low prices. They will pick up, but best to go to their office and give the dimensions and fix a date so that they send a big enough truck. The warehouse is near the canal, and not far from Place St Catherine.