For all its organisational flaws evolt.org was a really supportive place to learn and share in many of my formative professional years. It's been a long time since I was last formally involved, but I've stayed in touch with a few of the other founding members and visited some overseas (in Scotland, India, Chile, the US).
As noted on the page, the browser archive was the work of Adrian Roselli who lives up near Buffalo, NY I think. From memory, he started collecting them without any real plan to keep them online. However, with time so many of them were lost from their original hosting spots and so the archive was brought online.
In any case it seems to be a good download source when dealing with older systems.