Spam checker tools

In the FOSDEM deliverability meetups multiple spam testing tools were shared; the first of which looks extremely useful. Here’s the list I can remember:

  • - [inbound+outbound] all round Open Source abuse detection toolbox, including for spam
  • CanIt - looks like it was bought by another firm and has not received much love since
  • Spam experts - [inbound+outbound] proprietary tools used by big ISPs for filtering

What’s missing?