The latest published fastforward package is fastforward-0.51.tar.gz.
fastforward supports external mailing lists, stored in a binary format for fast access. It has a tool to convert sendmail-style include files into binary lists.
fastforward is more reliable than sendmail. sendmail can't deal with long aliases, or deeply nested aliases, or deeply nested include files; fastforward has no limits other than memory. sendmail can produce corrupted alias files if the system crashes; fastforward is crashproof.
fastforward's database-building tools are much faster than sendmail's newaliases. Even better, fastforward deliveries don't pause while the database is being rebuilt.
fastforward does not support insecure sendmail-style program deliveries from include files; you can use qmail's secure built-in mechanisms instead. fastforward does support program deliveries from /etc/aliases.