I believe there are two different fping tools

[1-1-2]

Clues here:

1. fping by Kwakkelflap claim a copyright since 2001 , fping by schweikert claim it's first version is crated in 1992.

2. They share the same project name, but in [fping by Kwakkelflap] it also called itself "Fast Pinger".

3. They don't share the same command option list. Also, they work & output in two different ways.

So, i means the [fping by Kwakkelflap] (version 3.0) here for windows here is wrote by a predecessor, which mean to use for just windows, without announcing the source code. The [fping by schweikert] (5.1 now) is worte by another predecessor, which announce it as a open source tool, possibly for system like Linux.

P.S. For guys not so confused but still looking for a [fping by schweikert] winows version, try fping-windows build on windows by cygwin, might be helpful.(●'◡'●)

[lazna]

There is a link to original binaries https://web.archive.org/web/20150215075229/http://www.kwakkelflap.com/files/fping300.zip