Plagger: DIY RSS/Atom aggregation

Plagger is a pluggable RSS/Atom feed aggregator written in Perl. You can think of Plagger as a blosxom or qpsmtpd for RSS aggregator.

Plagger comes with various plugin API hooks so that third-party plugins can extend:

  • Subscription (Bloglines, Google Reader, My Yahoo!, OPML)
  • Filter/Tag Content (, Technorati, URLBL)
  • Widget on output (,, Technorati, Bloglines, Blogpulse)
  • Publish (Gmail, SMS, Mobile Mail, XHTML, IMAP, NNTP, iPod, metaWeblog, Atom)

Plugins can be enabled / disabled using condition modules (= rule-based). So you can do "Forward all the updates to my Gmail account, but if the title contains 'Plagger' and bookmarked by 5 users on, SMS me as well."

By default, Plagger doesn't do anything with the 2 tough parts of aggregator: Crawling and User Interface, but lets other services/tools do it. My recommendation is to use Bloglines for Crawling and Gmail for User Interface (and Search). Eventually, you'll also be able to use Google Reader as Crawler and read the updates via Thunderbird using NNTP publish plugin.

We're in the alpha stage of development: All we have is only Bloglines and Gmail support yet.


We have a Subversion repository:

svn co plagger

If you want svn commit bit, email me your username and htpasswd format password to miyagawa<at>

Mailing List

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  • Tatsuhiko Miyagawa

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