The jQuery Archive
The goal of this archive is to find and preserve the alpha versions jQuery before October 27th 2006.
It's simple to find every version of jQuery starting from October 27th 2006. But that's not the case with older versions of jQuery. Thanks to John Resig we have the original snippet he started with in 2005 called jselect.
Bonus: Annotations by John Resig with his thoughts and memories around the initial release.