Utilities

GNOME Characters is a free and open source simple utility for finding and inserting unusual characters

Hashbrown is a free and open source simple graphical tool for generating, comparing and verifying MD5, SHA-1 and SHA-256 hashes

Confy is a free and open source program for viewing conference schedules for Linux

ExifCleaner is a free and open source, multi-platform desktop program for cleaning metadata from images, videos, PDFs and other files

Metadata Cleaner is a free and open source utility for view and clean metadata in files for Linux

Checksumo – free and open source, simple application for verifying specified file against given hash for Linux

Valentina is a free and open source, cross-platform patternmaking program which allows designers to create and model patterns of clothing

Guvcview is a free and open source, simple program for capturing and viewing videos from v4l2 devices for Linux

GSmartControl is a free and open source, multi-platform tool for checking the health of a hard disk and SSD

Redshift Control Plasma – free and open source applet for automatically adjusting color temperature of screen depending on time of day in KDE Plasma