The Dos Justin Benchmark program contains the Windows executable as well. It is also a command console executable.
The Justin DOS app (BENCHMRK.EXE, 16-bit, I assume) displays a memory bench and a floating point benchmark index value, while the Windows one (Benchmark.exe, 32-bit, I assume) will display Integer, Floating-point, Text Processing, I/O Processing, and Memory Access time for whatever algorithm is used. I really need to do more tests with this program on multiple cpus to see if it has any value. It is freeware, so I have enclosed it.
I do not see a copyright on the PiDOS. I found it in a forum, not too long ago. I can't recall which one now, I thought it was this one. You will want to edit your Pi.bat file to reduce the number of digits. Its default at 100,000 takes too long. I find that setting it to 25000 /f requires 19 sec, which is what I will bench with.
I found the Bytemark program compiled with DOS 4GW here,
http://www.tux.org/~mayer/linux/compare/index.html
Apparently, the compiler your choose makes a big difference. The program displays units of iterations/second, as well as index values normalized to a Pentium90. Without testing this particular Bytemark program yourself on a Pentium90, I would not place too much weight on the normalized values compared to the P90. I found a list on the web, for example, that gives the Cyrix 5x86-120 an integer rating of 0.97 (1.00 would be a P90), while I get only 0.90 with this particular Bytemark compilation. FYI, FP_FAST needs to be turned off on the Cyrix 5x86-120 for this program to compute the Neural Net, while the Cyrix 5x86-133 can have FP_FAST set ON.
As for the Ziff-Davis Winbench96, after reading the licence agreement, I am somewhat apprehensive to upload it here. The licence agreement states that the user shall not transfer the software, nor the licence agreement. The company is still sorta around. You might be able to find it if you do a search for WINBEN.ZIP, WINBEN.EXE, WINBEN96.ZIP, WINBEN96.EXE, WB96.ZIP, WB96.EXE. I no longer recall where exactly I found it.