Amazon, okay, but who else? Nearly all of the big .com-era startups (and major non-startup beneficiaries, like Sun) are _gone_. Yahoo somehow still exists, I suppose.
I suppose you could argue Google, but it's an odd one; it was right at the tail end, and was really only taking off as everything else was collapsing
I would argue Google because the dot-com bubble did not burst till 2000, and Google was founded in 1998.
Also, Netflix was founded Sep 1997. Also, Paypal, founded Oct 1999. Also, Ebay, founded 1995, [del: though Ebay and Paypal together today are worth only 23.8 billion dollars. :del]
I think a lot of the money made by founders and angel investors during the dot-com era was made by selling a startup to an established company for 100s of millions of dollars, which is pretty good money since it often took only took 5 years to go from the founding event to such an exit, but I cannot think of an easy way to get a list of such exits.
ADDED. In writing the above, I assumed Paypal was still part of Ebay. In reality they are separate companies again with market caps of 23.8 and 84.59 billion dollars.
I suppose you could argue Google, but it's an odd one; it was right at the tail end, and was really only taking off as everything else was collapsing