The latest version available is KompoZer 1.0.8 Beta 3, which has been released in 2010, the project being dropped.
In this article I will show you how to install KompoZer 1.0.8 Beta 3 on Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr, Linux Mint 17.1 Rebecca, Linux Mint 17 Qiana, Elementary OS 0.3 Freya, Pinguy OS 14.04, Deepin 2014, Peppermint Five, Linux Lite 2, LXLE 14.04 and other Ubuntu 14.10 and Ubuntu 14.04 derivative systems.
KompoZer 1.0.8 Beta 3 is available via the Universe repository of Ubuntu 12.04 Precise Pangolin, so we have to add that repository to our system, update the local repository index, install the kompozer package and remove the repository, so that other packages won’t be installed from it:
$ sudo sh -c 'echo "deb http://archive.ubuntu.com/ubuntu precise universe" >> /etc/apt/sources.list'
$ sudo apt-get update
$ sudo apt-get install kompozer
$ sudo sed -i '/precise/d' /etc/apt/sources.list
Optional, to remove kompozer, do:
$ sudo apt-get remove kompozer