Freshmeat page: http://freshmeat.net/projects/mail2sms/
mail2sms converts a (MIME) mail to a plain-text message, allowing search/replace, conditional rules, date/time dependent actions, customizing the output format, etc. The output length defaults to 160 characters, which is perfectly suitable for sending the text to a GSM telephone as an SMS message. This software does not include any code for actually sending the text to anything else but another program or stdout.
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!