Baby Walz on there is the one I've used the most for general "equipment" / clothing type of things. They also have a great brochure which you can request for browsing through. http://www.baby-walz.com/
Seriously though depending on what you're looking for a google will pull up many Swiss baby stuff sites.
Personally I think babybutt has the best choice, if you can get past the name! A voucher from there may also then be valid for kinderbutt which is the shop for older children (but you would have to check.)
This user would like to thank Pepper for this useful post:
jubilane.ch - they sell b0ble kids furniture which my son loves! shipping arrived in good time
deltakids.ch - good customer service, but shipping wasn't as quick - not sure if it was because they have to order some items.
I would really try to avoid Baby Joe (www.babyjoe.ch)! The shipment takes forever and is extremely inconvenient when you cannot stay home and wait for the package to arrive. They also do not have very informative service/information centre.