EGroupware

cd /path/to/your/docroot
git clone git@github.com:EGroupware/egroupware.git
cd egroupware
install composer.phar from https://getcomposer.org/download/
install myrepos (mr) from https://myrepos.branchable.com/ or your distribution package manager
add a line /path/to/egroupware/.mrconfig to your ~/.mrtrust, to allow running composer.phar and git clone -b 16.1
mr up
enable further / non-default EGroupware apps be uncommenting them in .mrconfig and run mr up
continue installation at http://localhost/egroupware/setup/
to get minified JavaScript and CSS you need to install nodejs and grunt, if you have not already done so
install nodejs from your distribution package manager
npm install -g grunt-cli # installs grunt globally
npm install # installes required grunt modules into node_modules/ dir
grunt # minify javascript and css, needs to run after every update!

install composer.phar from https://getcomposer.org/download/