The current stable release is ircd-ratbox-2.2.8:
[ FTP US | HTTP US | FTP US2 | HTTP JP ]
Signature file: [ HTTP US ]
sha1sum: e99db7ee3f96ca200fc454409bfb11e35e3951a7

To checkout the current stable tree from the subversion repository:
svn co http://svn.ratbox.org/svnroot/ircd-ratbox/branches/RATBOX_2_2

The current testing release is ircd-ratbox-3.0.0beta11:
[ FTP US | HTTP US | FTP US2 | HTTP JP ]
Signature file: [ HTTP US ]
sha1sum: e1f7f96c35421248b6aebc0aa4be08116433fa20

There is no current devel release.

To checkout the current development tree from the subversion repository:
svn co http://svn.ratbox.org/svnroot/ircd-ratbox/trunk

All released versions are available from: ftp://ftp.ircd-ratbox.org/pub/ircd-ratbox/