Syntellia is on the ground this week at SXSW 2013 as it showcases its popular gesture-based keyboard app, Fleksy.

Specifically, it’s demoing the app’s integration with the upcoming Leap Motion Controller, which allows for “Minority Report“-esque midair typing.

What’s more, Syntellia is also releasing an iOS SDK to encourage third-party developers to create apps that take advantage of Fleksy’s innovative features. This should prove quite useful especially since Fleksy cannot be set as the default keyboard for iOS, in accordance with Apple’s restrictions.

If you can’t see the video embedded above, please click here.

TechCrunch provides some details on Fleksy’s iOS SDK:

It offers developers to use Fleksy’s signature foolproof typing engine, as well as customization options around theme, layout and more. Devs can even use the “invisible” Fleksy keyboard if they want to get all the chrome out of the way while still allowing for text entry. Interested developers can email Fleksy direct for more info.

And the first to use the SDK is said to be the popular utility app Launch Center Pro, which got its first major update just a few days ago.

As I reported yesterday, Philips has also released an iOS SDK for its Hue controlled lighting system, shortly after PayPal released its own to enable seamless PayPal integration in iOS apps.

And last month, the iOS SDKs for Google Maps and Facebook were both updated with new features and improvements.