Lasso is licensed under the GNU GPL and the latest release is available here as a gzipped tarball: lasso-2.3.5.tar.gz
Debian packages are available in the official Debian distribution, they are included in the current testing and development versions (etch and sid).
Additionnaly there are lenny and karmic packages and there may be more up-to-date packages available in our local apt repository. Pick the one appropriate for your distribution:
deb http://deb.entrouvert.org lenny main deb http://deb.entrouvert.org karmic main
Available packages are:
You can also browse the repositories on deb.entrouvert.org
Windows support is currently being updated, expect some news soon.
Lasso is also available through Git; you can checkout source code (see below) or browse source files online with Redmine.
git clone http://dev.entrouvert.org/git/lasso.git