Asaph – PHP/MySQL
Page Cookery – PHP/MySQL
EchoWaves – Ruby On Rails
Floopo – PHP/MySQL
JaikuEngine – Python
Jisko - PHP& MySQL
Sharetronix - PHP/MySQL
StatusNet （formerly Laconica） – PHP/MySQL
Typepad Motion – Django/Python
Yonkly – ASP.NET
via： 10 Open Source Microblogging Scripts
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