I'm gradually sorting through my old boxes of media and donating most of them to a local computer museum, but I thought it would be worth making images of anything I couldn't find online with some quick googling. I'll be updating this thread with more uploads (hosted on archive.org) as I find the time. Hopefully these will be useful to someone!

Triplex Nvidia GeForce Millennium Silver Driver CD
The label on the disc says it contains drivers for:
Millennium Silver MX200/MX400
Millennium Silver GeForce2 Ti
Millennium Silver GeForce3 Ti200/Ti500
Millennium Silver GeForce4 MX Series
Millennium Silver GeForce4 Ti Series
https://archive.org/details/triplex-nvidia-ge … -models-drivers

Toshiba Satellite Pro 4200, 4300 Series Product Recovery CD ROMs (3 discs)
https://archive.org/details/toshiba-satellite … ecovery-cd-roms

IomegaWare clik! 40 CD Version 1.2
https://archive.org/details/iomega-ware-clik- … -cd-version-1.2

ASUS N550JV / R552JV Notebook PC Users Driver & Utility Ver 1.0 DVD ( Windows 8 ) - not retro, but I couldn't find it online anyway, so here it is.
https://archive.org/details/asus-n-550-jv-and … r-1.0-windows-8

IBM CD-RW Software P/N 09N4122
"Including Adaptec Easy CD Creator v4.02c and DirectCD v3.01c for Windows 95, Windows 98, Windows 2000, and Windows NT 4.0"
https://archive.org/details/ibm-cd-rw-software-p-n-09-n-4122

Toshiba Satellite A100 / Satellite Pro A100 Product Recovery DVD ROM (P/N. TR06B36E1DVD)
https://archive.org/details/toshiba-satellite … ecovery-dvd-rom