clusterit https://slackbuilds.org/repository/15.0/network/clusterit/
dma https://slackbuilds.org/repository/15.0/network/dma/
libaal https://slackbuilds.org/repository/15.0/libraries/libaal/
partclone with reiser4 https://slackbuilds.org/repository/15.0/system/partclone/
reiser4progs https://slackbuilds.org/repository/15.0/system/reiser4progs/
xen-nox no SDL no GTK no FUSE and older xenstore daemon https://slackbuilds.org/repository/15.0/system/xen-nox/
systraq http://slackbuilds.org/repository/15.0/system/systraq/
drbd-kernel for release KVER (none)
drbd-utils 9.20.2 version update http://slackbuilds.org/repository/15.0/system/drbd-utils/ by Mario Preksavec
keepalived 2.2.7 re-enable nftables and libipset http://slackbuilds.org/repository/15.0/network/keepalived/ by Marek Wodzinski
ocfs2-tools 1.8.7 version update and builds fine on multiprocessor https://slackbuilds.org/repository/15.0/system/ocfs2-tools/ by Mario Preksavec
sshguard - better init script http://slackbuilds.org/repository/15.0/network/sshguard/ by Andrzej Telszewski
syslinux-next 6.04-debian conflicts with base (none)
Binaries for those builds are available over there