GNOME Citations
GNOME Citations – manage your bibliographies using the BibTeX format. Free and open source program
Feeling Finder
Feeling Finder – fast selection and search of emoticons. Free and open source program
Alligator
Alligator is a convergent RSS/Atom feed reader. Free and open source program
Giara
Giara is an application for Reddit on Linux. Free and open source program
TextSnatcher
TextSnatcher is a text recognition program. Copying text from images. Free and open source program
Ristretto
Ristretto is an image viewer for the Xfce desktop environment. Free and open source program
KGeoTag
KGeoTag is a photo geotagging program. Free and open source
GPU-Viewer
GPU-Viewer is a program that displays all the important details of glxinfo, vulkan info and clinfo in a graphical interface. Free and open source program