Office 365 Solutions Dev

Office 365:

"You can use your Office 365 Small Business or Office 365 Enterprise subscription to develop solutions. If you don’t have an Office 365 subscription yet, sign up by clicking the following link. The subscription includes an Office 365 Developer Site where you can create and test your apps and other solutions. The different Office 365 subscriptions determine which services you can access, and what types of solutions you can build."