Most of these charitable associations will pick up from your residence but times may not be convenient for you. You can also drop off your things at these locations.  You can put your clothes in the giant yellow boxes that are near various recycling areas in town.

Salvation Army: Route de Chêne, Tram 12, stop les Roches

http://www.brocki.ch/geneve/kontakt.cfm

Emmaus -- Carouge, Tram 12, stop Rond Point de Carouge

http://www.emmaus-ge.ch/

Caritas -- various locations

http://www.caritasge.ch/p107000353.html

Centre Protestante Social -- La Renfile in Meyrin and another location in Plan -les-Ouates, Tram 12, stop Trefle Blanc

http://www.csp.ch/ge/brocantes/

What kind of electronics do you have? - I know a guy who collects electronics all over switzerland.

http://fr.groups.yahoo.com/group/freecyclegeneve/

"Changing the world one gift at a time"
A group for all individuals or others in Geneva (Switzerland) who want to "recycle" that special something rather than throw it away. Whether it's a chair, a sofa, a fax machine, piano or an old door, feel free to post it. Or ask for something you may be looking for yourself! Everything posted must be free, legal and appropriate for all ages. No Politics or Spam please.