YooTech Wireless Pad
If you're just looking for a cheap wireless charging pad to throw on the bedside or at work, this is it. The YooTech is small, effective, and very affordable. The only downside here is this charger doesn't support "fast" wireless charging.
This works great sitting on the side of your bed if you're charging overnight, but others deliver a faster charge. Keep that in mind, or get it simply because it's so cheap.