installs freemind on Debian stretch(testing) - almost works, some issues, have asked in freemind sourceforge forum - https://sourceforge.net/p/freemind/discussion/22102/thread/8ee5e81f/

freemind-install.sh

# distro can be one of experimental, unstable, testing or ubuntu. 
DISTRO=testing

echo
echo install freemind
echo script by Andreas Krueger 2017, version v01
echo
echo must be run as root:

echo
echo adding repo to /etc/apt/sources.list.d/freemind.list

cat <<EOF >> freemind.list
deb http://eric.lavar.de/comp/linux/debian/ $DISTRO/
deb-src http://eric.lavar.de/comp/linux/debian/ $DISTRO/
EOF

sudo mv freemind.list /etc/apt/sources.list.d/


echo adding PGP key:

wget -O - http://eric.lavar.de/comp/linux/debian/deb_zorglub_s_bawue_de.pubkey | sudo apt-key add -

echo
echo updating:
sudo apt-get update


echo installing:
sudo apt-get install libbatik-java libjcalendar-java freemind
sudo apt-get install freemind-plugins-svg/experimental freemind-plugins-time/experimental freemind-plugins-help/experimental libjgoodies-forms-java/testing


echo
echo done.
echo if there were no errors, then freemind got installed. Type \'freemind\' to try. You might want to add a menu entry pointing to this file:
which freemind
echo

I think there's something wrong with Eric Lavarde's key. expired or something maybe? or his repo isn't signed with it (anymore)?

The following signatures were invalid: 98FB95CD6C404DF7E758601D27CD3F36869D2871

sort of calls this out.

US$0.02++