BeeRef is a free and open source image viewer application for Linux, Windows and MacOS. Using BeeRef you can quickly arrange your reference images and view them while you create anything. In BeeRef you can move, scale, rotate and flip single images and also bulk mass scale images to the same width, height or size. Some other features are arrange images vertically and horizontally, add text notes and more.
Download BeeRef [Windows, Linux, macOS]
How to Install BeeRef Image Viewer on Ubuntu Linux
BeeRef is available as a flatpak package and portable Linux app. Install flatpak and flathub on your system and restart after the installation. Open the terminal software using the ctrl+alt+t keys and run below BeeRef flatpak installation command.
flatpak install flathub org.beeref.BeeRef
After the installation you can start BeeRef using this flatpak command or via the show applications menu.
flatpak run org.beeref.BeeRef
You can also uninstall it using this command.
sudo flatpak uninstall org.beeref.BeeRef
Install BeeRef [Another method]:
Download BeeRef for Linux and save it on your Downloads folder. In the terminal app run below commands one by one.
sudo chmod +x ~ BeeRef-0.2.0-linux