nomacs is an image viewer with capability of syncing multiple instances
nomacs is a free image viewer for windows and linux systems, which is
licensed under the GNU General Public License v3. nomacs is small, fast and
able to handle the most common image formats. Additionally it is possible to
synchronize multiple viewers. A synchronization of viewers running on
the same computer or via LAN is possible. It allows one to compare images
and spot the differences (e.g. schemes of architects to show the
you can supply an image file to nomacs and it will open it immediately.