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With PDFCreator you can convert documents into "Portable Document Format" format native to Microsoft Windows operating system. PDFCreator automatically creates a virtual printer that prints to PDF files, and thereby allows practically any application to create PDF files. The application support PDF, JPG, PNG, TIF and can merge multiple documents into one file.

GorillaPDF is a set of free web-based tools for converting files to the PDF format. The set consist of Text to PDF, JPG to PDF, PNG to PDF, WORD to PDF, Excel to PDF, PowerPoint to PDF, ODS to PDF, ODP to PDF and Encrypt PDF tools.

ImageGlass is a lightweight, versatile image viewing application that is designed for viewing images in a clean and intuitive working environment. It share many similarities with Windows Photo Viewer that shipped with Windows 7 and Windows Vista. ImageGlass provides tools that can be used to conver images to different formats, invluding BMP, EMF, EXIF, GIF, ICO, JPG, PNG, TIFF, WMV and BaseString.

Apple Photos is an app native to the macOS and iOS eco system. The application comes pre-installed with all Macintosh computers, iPhones and iPads. With Apple Photos you can manage, store and browse all your photos in a neat application.

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.