ColorPicker App
ColorPicker App – screen color picker application for Linux Desktop
sK1 Color Picker
sK1 Color Picker – advanced color picker application with magnify glass and palette management functionality
Gpick
Gpick is an free and open source advanced color picker and palette editing tool for Linux
Pick
Pick – a software for picking colors on the screen in Linux
Gcolor3
Gcolor3 – free open source software for color choosing (on-screen color detection) and color selection in Linux
Buka
Buka is a book manager with a simple and minimalistic user interface for organizing and reading PDF books
csBooks
csBooks – manager and reader of eBooks in PDF, EPUB and MOBI formats
Bookworm
Bookworm – free and open source software simple, focused eBook reader for Linux
Polar
Polar – free and open source cross-platform software for organizing and reading PDF files, capture web content, with support for adding annotations
Foliate
Foliate – free and open source simple and modern eBook viewer for Linux desktop