Instructions: Use shift-click (depending on your browser) to download the file you want to install. Downloaded Debian packages (*.deb) can be installed directly using dpkg -i file. Other installable packages (*.tgz) are usually made of a folder named deploy that contains the files to be installed and a little installer - see the contained README files. Source packages (*_src.tgz) usually have a script called master that can be used to build from source and to create the deployment files.