API list http://developer.yammer.com/restapi/

Yammer.SimpleAPI (http://yammersimpleapi.codeplex.com)

Contract Meow sample (http://yammercontractmeow.codeplex.com)

JSON C# Class Generator (http://jsonclassgenerator.codeplex.com)

https://www.sched.do

https://github.com/yammer/sched.do

https://yammercontractmeow.codeplex.com/

http://channel9.msdn.com/Events/Build/2013/3-605

Yammer Developer Site

https://developer.yammer.com/

Yammer Developers Network

http://yammer.com/yammerdevelopersnetwork

Mobile SDKs

https://developer.yammer.com/mobile/

Dev Certification (soon!)

https://about.yammer.com/certifications/

Getting Started

https://developer.yammer.com/introduction/

REST API documentation

https://developer.yammer.com/restapi/

Embed Documentation

https://developer.yammer.com/connect/