This is a video tutorial that explains about how to create an approval workflow in SharePoint designer 2010.
You can also check SharePoint 2013 workflow development tools and Create a sequential workflow using Visual studio 2010 in SharePoint 2010 [Read here].
You can also check SharePoint 2013 workflow development tools and Create a sequential workflow using Visual studio 2010 in SharePoint 2010 [Read here].
Hello, my name is Bijay. I'm a SharePoint MVP. 