To make life a bit easier there are several calculators on Designerdata that you can use for free. We not only like to provide calculators like second moment of inertia and deflection which work well together and are the more popular ones. We also would like to know what you would like to have. Springs and cost price calculators were already build to request, you've got one too?
Missing a calculator? Let us know and please send an email to DesignerData.