If this is your first time using the Myo armband, get started with Myo Connect on Windows or Mac.
Windows(SDK release notes/known issues)
Myo Connect for Windows 1.0.1 (Sep 18, 2015)
Windows SDK 0.9.0 (Jun 10, 2015)
Myo Connect for Mac 1.0.1 (Sep 18, 2015)
Mac SDK OS X 0.9.0 (Jun 10, 2015)
iOS SDK 0.5.2 (Jun 12, 2015)
Android(SDK release notes/known issues)
Android SDK 0.10.0 (Dec 19, 2014)
The Unity package is included in the Windows and Mac SDKs.
Myo Firmware 1.5.1970 (Oct 20, 2015)
Myo Alpha Firmware 1.1.5 (Dec 19, 2014)
Unofficial tools and language bindings - See here for a list of community-supported tools and language bindings.
Branding and UI Guidelines - Check out the these Guidelines for common UI elements and Myo application naming conventions.
User Experience Guidelines - The Myo User Experience Guidelines explain the some of the best practices for integrating gesture control into your applications.