Download

SZARP is hosted at GitHub. There are a few options available:

Download Windows version (client only)

Xorg client (Windows 7, recommended for MATE): http://szarp.org/static/xorg-setup.exe
Latest SZARP for Windows: https://github.com/Newterm/szarp/releases/
Older versions (including Xorg for Windows XP/2000): http://sourceforge.net/projects/szarp/files/

Download binary Debian packages

There is APT repository with SZARP packages available for Debian current stable and unstable distributions. “Unstable” version is updated more frequently. Add following repository to your sources.list file:
deb http://www.szarp.org/debian unstable main non-free
or, for stable version:
deb http://www.szarp.org/debian stable main non-free
(Currently stable still points to wheezy version, if you use jessie, change release name to jessie.)

Then use apt-get update and apt-cache search szarp to list available packages.

APT repository key can be imported using following command:
wget -O - http://szarp.org/debian/key.asc | apt-key add -

Download binary Ubuntu packages

Entry for APT repository for Ubuntu 14.04 LTS Trusty Tahr packages is:
deb http://www.szarp.org/debian trusty main non-free
Packages for older Ubuntu versions are available via:
deb http://www.szarp.org/debian raring main non-free
deb http://www.szarp.org/debian precise main non-free
deb http://www.szarp.org/debian oneric main non-free

Get the source code

You can download current SZARP source and compile it yourself. Source is available at Git repository, use something like:
git clone https://github.com/Newterm/szarp.git