Open Source ImageGlass Alternatives

The classic Eye of GNOME is the official and default image viewer for the free and open source desktop environment GNOME. The application comes bundled with GNOME and is in later releases known as Image Viewer. However, Eye of GNOME can be used in any Linux operating system or distribution. It also share many similarities with another official image viewer for GNOME called gThumb

nomacs is a free, open source, cross-platform image viewer. With nomacs you can easily view and manage all common file formats including jpg, png, tif, bmp, raw and many more. The sleek user interface provided by nomacs features a semi-transparent widgets that display additional information such as thumbnails, metadata or histogram.

gThumb is a free and open-source image viewer and Image organizer for the GNOME Desktop. The software can be used to view, orginize and edit BMP, GIF, ICO, JPEG, PNG, TIFF, XPM files. An importer tool is also include, it can be used for transferring photos from cameras. With the editing tool, photos can be rotated, flipped and cropped, or optimized for the right contrast ratio. gThumb is developed by the The GNOME Project and released under the GNU General Public License.