Evutec makes some interesting cases made out of interesting materials, including wood, carbon fiber, kevlar and, now, recycled cork. For 2016, it's got some brand new models that are bonded are reinforced with fiberglass and kevlar in some cool designs.
They're not available yet but should arrive in the next few months for $50-$60 (around AU$80 or £40).
What's a little a little strange about the Switcheasy N+ Metallics case ($20, or around AU$30/£15) is that when you go to hold it you think it's going to be hard plastic. But it's actually a soft, bendable TPU case. Available in multiple metallic colors, including everybody's favorite, rose gold.
Seidio's Luma Case uses your device's LED camera flash to disperse colorful light throughout the clear body of the case to make sure you don't miss notifications and/or annoy everybody in dark environments. Available in multiple color options.
iOttie makes popular car mounts, including some that wirelessly charge your phone. That's fine for certain Android models that have a Qi wireless charging chip built into them, but currently the iPhone is missing that component. Enter the iOttie Ion, the company's new wireless Apple MiFi-certified charging case (no charging Qi base is included, just the case for $50). Also available in black.
The Olloclip Studio is a $90 (AU$130 or £60, converted) photography-oriented case system that's designed for use with Olloclip's assortment of add-on lenses, which clip over the iPhone's lens to give you telephoto, wide angle, fisheye, and macro capabilities. The new rig ships in early February and is available for both the iPhone 6/6S and iPhone 6 Plus/6S Plus.
Seidio's upcoming Kryptec series has kind of a cyber militaristic theme with a tagline that reads "Battlefield to backcountry." Available soon in multiple colors for around $30 (AU$45 or £20, converted directly).
Stacked is a new wireless charging system for the iPhone that's a good concept but still has a little work to do in the design department. After you put a Stacked case on your phone, you can then magnetically charge your phone with a Stacked external battery back. You can also charge multiple battery packs at once, stacking them on top of each on a magnetic wall charger. That's pretty cool. The only bad thing is the battery backs are fairly bulky (they need to get slimmer) and the system is fairly pricey at $130 (about AU$190 or £90).
I liked the look of X-Doria new Impression cases that will be part of its Defense Lux line when they ship in the next few months. They're due out soon and carry a list price of $60 (about AU$85 or £40).