I was notified that some Files in the Download Archive were corrupt and after re-uploading them but recently getting repeated notification for the exact same Files being currupt, I retrieved the entire File Archive from the Server and scanned them.

Turns out several were corrupt indeed, unfortunately including multiple local Backups I had - even extremely old ones (?)

A few ones I was able to restore, but not all of them.

So in case you have a functional Version of these Files, drop me a note pls :

DirectX-90c-x86-x86_64-Feb2006.zip
DirectX-90c-x86-x86_64-Jun2006.zip
manual-Quantum3D-HeavyMetal.zip
mesafx-v06109.zip
SFFT-Alpha26.zip

I have both the DirectX files as downloaded from FalconFly.de in January 2012.  The .zip files are NOT corrupt, but I have not tested the .exe files inside.

I have the Quantum3D file as downloaded from FalconFly.de in Feb. 2005 (not corrupt).

I think you can get the SFFT driver from 3dfxzone.it via the Wayback Machine, although the file name is slightly different:

https://web.archive.org/web/20060607174514/http://www.3dfxzone.it/public/files/SfftAlpha26.zip

I don't have the mesafx file in .zip format, but I do have MesaFX-6.1.0.9.exe, so you could probably execute that and ZIP the decompressed contents (as I recall you did that sometimes in the past).

I will PM my email address.

(Edit)  File sizes are as follows:
DirectX-90c-x86-x86_64-Feb2006.zip (51338769 bytes)
DirectX-90c-x86-x86_64-Jun2006.zip (54814471 bytes)
manual-Quantum3D-HeavyMetal.zip (2429159 bytes)
MesaFX-6.1.0.9.exe (1777673 bytes)

Cool :)

Mail is sent...

Odd to see you got the Files intact - even in very old backups of mine, the Zip Containers were corrupted - and so were the Files I pulled off the Server (?)