Virto Workflow Scheduler is a tool for Microsoft SharePoint that allows running automatically any workflow within single SharePoint site collection on a specific date and time.
Virto Workflow Scheduler is no code and ready-to-use web part which can be installed on SharePoint site and does not require Microsoft Visual Studio of SharePoint Designer. Once web part is installed, you can create your specific rules to running workflow, e.g. start every hour, day, and week, recur it etc.