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Your smartphone is already a good camera, but there are plenty of accessories out there to make it a great one. Gizmag looks at some of the best smartphone camera accessories available in 2015.

The third model of the Freeride E family is KTM’s first street-legal electric bike. After the Motocross and Enduro versions, the Supermoto is a battery-powered playbike that can also double as one of the coolest commuters out there.

Following the much-hyped iOS launch back in March, Twitter's live broadcasting app Periscope has now landed on Android. Unveiled on Tuesday, the app carries the same functionality as its iOS sibling, but with a few minor differences unique to the Android platform.

We've seen retro arcade-style video gaming consoles that are tiny, as well as ones that utilize an iPad and that even serve beer. The Pixelkabinett 42 has its own unique feature, however, in that it looks like a vintage industrial wooden cabinet when not in use.

Although personal drones are becoming increasingly popular, a lot of people are still understandably intimidated by their exposed propellers. That's why Polyhelo created the Nano Tornado. It's a quadcopter, but instead of open props it utilizes four ducted fans.

Aimed at those with MS, spinal cord injuries, or complete paraplegics, the TheraTryke is a therapeutic and recreation recumbent bike that is designed to let riders use their hands, feet or a combination of both together to propel themselves forward.

A Japanese company has invented a new type of bearing that's up to 90 percent more efficient. Coo Space's greaseless Autonomous Decentralised Bearings eliminate a key component - the cage used to keep the balls separated from one another in the races.

If you've seen Mad Max: Fury Road, then you'll be familiar with the tracked Peacemaker chase vehicle. In fact, the Peacemaker was actually a modified Ripsaw, made by Howe & Howe Technologies. Now, Howe and Howe has announced the Ripsaw EV2 – it's described as a "high-end luxury super tank."

NASA has partnered with DARPA to develop technology that allows for the indexing of Deep Web content. The agency plans to turn the tool towards the wealth of data collected by its numerous spacecraft, as well as its huge archive of published scientific data.

A hydrogen fuel cell car built by students from TU Delft university is claimed to have become the fastest of its kind to lap the Nürburgring Nordschleife. The Forze VI car was unveiled in 2013 by the Forze student racing team. It is said to have lapped the circuit in under 11 minutes on May 7.

A research team has recently created an energy-scavenging system that charges a smartphone's battery, letting it last up to 30 percent longer per charge – and the system does so using radio signals emanating from the phone itself.

It's been a big year for Kahn Design. The British tuning shop has been making headlines over and over, thanks to projects like the Land Rover Defender 6x6. Its latest two designs aren't quite as extreme as that Geneva-debuted six-wheeler, but they're quite interesting in their own right.