Tell-a-friend that imports contacts?
I found another one that is open source at openinviter.com that is free but it's pretty bare bones and you have to build it in to your site i.e. it doesn't have a nice user interface like the smartaddon one does.
I'm searching google and I'm surprised I'm not finding more of these. There are other things like sharethis.com but these are really focused on social sharing it seems ...
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Anonymous Affiliate -
Thanks
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dsiomtw -
Thanks
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MichaelNech -
Thanks
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