Copyright (c) 2010 by David Kerkhoff. All rights reserved.. DavidKerkhoff: Skratch: 2010. Skratch. Version 1.001. Skratch is a trademark of David Kerkhoff.. David Kerkhoff. Copyright (c) 2010 by David Kerkhoff. All rights reserved. Skratch is 100% freeware, also for commercial use.. Freeware