CloudToolbox
Web-based manager for user dynamic instantiated cloud images
... system and associate it to the requester user account with a given amount of resources (ex. limited time, limited cost, etc...). The user will then be able to start and stop the machine from the CloudToolbox web interface when needed, and use it until the resources assigned are over and the machine expires. When the machine is not in use, the CloudToolbox will automatically undeply it, saving costs on the cloud provider