Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
Voiceflow - Build voice apps in your browser without coding
Android Studio - Android development environment based on IntelliJ IDEA
Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
Adobe AIR - Adobe® AIR® runtime enables developers to package the same code into native apps for Windows and Mac OS desktops, iPhone, iPad, Kindle Fire, Nook Tablet & Android. Buy now.
API to bot - Convert your API to Alexa skill or Google Home app in 5 mins