The current stable release is ircd-ratbox-3.0.10:
[ HTTP US ]
Signature file: [ HTTP US ]
sha1sum: fa1645495c765cf921726b65172ff5eceeea008a
sha256sum: 8d871ab81e8581179c3b831e25bd2f6d4f6dfc77380cb190237221bda247ead4

To checkout the current stable tree from the subversion repository:
svn co http://svn.ratbox.org/svnroot/ircd-ratbox/branches/RATBOX_3_0

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: https://www.ratbox.org/download/
All current releases are signed with the following PGP key Key ID 0x201FF57E