Spigen®
It's made from synthetic leather, has special slots for adding IDs and Cards (not too many...), it uses an ultra slim folio to reduce its weight and size, it's confortable, luxurious and has many positive recommendations from it's existing buyers.
SUPCASE
This wallet is made form synthetic leather, has a built-in slot to add usually two credit cards, the magnetic closure is working very fine, it offer a high protection for your smartphone against scratches and drops, and it seems to be a high durable wallet.
i-Blason
It's very cheap, it's made from vagan leather and offers full support for your gadget functions (including heartbeat sensor and the finger print scanner), the material will offer a high protection against shocks and scratches, it has 3 slots for adding up to 3 cards into your Galaxy S5 wallet.
Q Card Case by CM4
This wallet is awesome... It was designed for two main purposes: to protect your smartphone and to make your life simpler. You can carry up to 3 cards plus some cash, it has a build-in audio amplifier, and it offers you full control to all functions of your gadget.
Kroo Urban
This wallet is made from a superior synthetic leather and it offers a high protection against any shocks and scratches. The most impressive feature is its solid that can carry up to 5 credit cards or IDs, plus some cash or even documents. Also, I find this wallet a jewelry for any women who owns a Galaxy S5.