The Xfce4-screenshooter is an application that can be used to take snapshots of your desktop screen.
Gnome Screenshot
GNOME Screenshot is a small utility that takes a screenshot of the whole
desktop; the currently focused window; or an area of the screen.
KSnip
Ksnip je alat za snimke ekrana na više platformi baziran na Qt-u koji pruža mnoge funkcije za označavanje vaših snimaka ekrana.
Flameshot
Powerful yet simple to use screenshot software.