For us OLD folks that use Bob's old Blurcalc program on XP 32 bit machines, it is a joy. I've not found anything else like it online. It would be nice to have a concise source that gives the formulas used in the old Visual Basic Blurcalc program. If available, they could be put into a newer program for our Bokeh enjoyment. Glad to be part of the Community!
As far as I know there is nothing like it anywhere online!
My solution to the issues of upgrading my OS form XP 32-bit to Win7 64-bit was to install the Microsoft Virtual (XP) Machine, which emulates a 32-bit Windows XP system, then run Blurcalc (and a bunch of other older programs that don't work with Win7 64bit) on the Virtual Machine. It works well and allows me to use quite a few older programs that I could never get to work on Win7 64-bit.
It's pretty unlikely I'll ever get around to updating Blurcalc or Dofcalc to work on Windows 7/8/10 64-bit systems. It might happen, but I wouldn't hold my breath for it.