[cpayne]

Dropbox and Youtube always spring to mind. There were Dropbox solutions for YEARS before they came around.

Even Microsoft had one (well before OneDrive) they gave away for free - still, Dropbox came to the top.

And Youtube and a bunch of clones.

Go back even further: MS Word - Wordperfect Excel - Lotus 123 Just about every dinky database - MS Access

[flukus]

Youtube in particular. I think it was about timing, broadband was just getting to the critical point where even grandma could watch videos. But people were trying to make youtube in the mid 90's.