Autoconf 2.72 has been released, see the release announcement:
https://lists.gnu.org/archive/html/autotools-announce/2023-12/msg00003.html
Autoconf 2.70 has been released, see the release announcement:
https://lists.gnu.org/archive/html/autotools-announce/2020-12/msg00001.html
Zack Weinberg has released another beta, Autoconf 2.69d has been released, see the release announcement: <https://lists.gnu.org/archive/html/autoconf/2020-11/msg00003.html>
As written there: if you have time to help by developing and testing patches for the release blockers, please do.
Autoconf 2.69c has been released, see the release announcement:
<https://lists.gnu.org/archive/html/autoconf/2020-09/msg00006.html>
Autoconf 2.69b has been released, see the release announcement:
<https://lists.gnu.org/archive/html/autoconf/2020-07/msg00006.html>
Autoconf 2.69 has been released, see the release announcement:
<https://lists.gnu.org/archive/html/autoconf/2012-04/msg00041.html>
Autoconf 2.68 has been released, see the release announcement:
<http://lists.gnu.org/archive/html/autoconf/2010-09/msg00069.html>
Autoconf 2.67 has been released, see the release announcement:
<http://lists.gnu.org/archive/html/autoconf/2010-08/msg00010.html>
Autoconf 2.65 has been released, see the release announcement:
<http://lists.gnu.org/archive/html/autoconf/2009-11/msg00040.html>
Autoconf 2.64 has been released, see the release announcement:
<http://lists.gnu.org/archive/html/autoconf/2009-07/msg00079.html>
Beta release Autoconf 2.63b is now available at
ftp://ftp.gnu.org/pub/gnu/autoconf/autoconf-2.63b.tar.xz
See the release announcement at
http://lists.gnu.org/archive/html/autoconf/2009-03/msg00104.html
Autoconf 2.63 is now available at
ftp://ftp.gnu.org/pub/gnu/autoconf/autoconf-2.63.tar.lzma
See the release announcement at
http://lists.gnu.org/archive/html/autoconf/2008-09/msg00065.html
Autoconf 2.62 is now available at
ftp://ftp.gnu.org/pub/gnu/autoconf/autoconf-2.62.tar.lzma
See the release announcement at
http://lists.gnu.org/archive/html/autotools-announce/2008-04/msg00002.html
Autoconf development can now be tracked via git access, rather than CVS. See https://savannah.gnu.org/git/?group=autoconf for details. For now, the git and CVS repositories are manually synced. Eventually, CVS write access will be disabled, but the plan is to leave CVS read access.