Samsung, a company that often gives away lots of free goodies with their smartphones, currently has a promotion going on in Germany where buyers of the Galaxy S4, S4 Active, and S4 mini will get free accessories worth €100. The offer will last between August 20th and September 1st, and the accessories will be delivered to the buyer after he/she provides sufficient proof of purchase, including the IMEI number of the device.
As for the accessories, Galaxy S4 and S4 mini buyers will get two flip covers (black and white colors), a car charger, and one NFC TecTile tag. The Galaxy S4 Active doesn't have a flip cover available for it just yet, so Samsung has replaced the cover with a Bluetooth headset, which personally sounds like a better deal to me considering the S4 Active is inherently rugged and tougher than the other two smartphones anyway.
Hit the source link for more details on the promotion, and also download this PDF file that lists the terms and conditions of the deal.