Freshmeat page: http://freshmeat.net/projects/hypermail/
Hypermail 2 is a much enhanced version of the popular tool that converts mails into nicely formatted HTML pages. Version 2 has a lot of new features including MIME support. Perfect for archiving mailing lists and similar.
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!