Currently only source tarballs are available. fricas-x.x.x-full.tar.bz2 is a "full" source tarball containing pregenerated Lisp file and images. It also contains noweb. Use it if you already have working gcl or if you want to use Lisp different than gcl.
fricas-x.x.x-+gcl.tar.bz2 additionally to "full" source also contains gcl sources. Use it if you want to use gcl but do not have it.
You need a working SVN command that supports the HTTP protocol. You can get a copy from subversion site
To get the mainline version of FriCAS just do
svn co https://fricas.svn.sourceforge.net/svnroot/fricas/trunk fricas
This will put the sources in a directory named fricas. Note that you need to fetch dependencies separately. Also, SVN version contains only a few pre-generated files -- just enough to bootstrap.
You can
browse SVN repository online