Kompare is a GUI front-end program that enables differences between source files to be viewed and merged. It can be used to compare differences on files or the contents of folders, and it supports a variety of diff formats and provide many options to customize the information level displayed.
Howl
A general purpose, fast and lightweight editor with a keyboard-centric minimalistic user interface.
Notejot
Stupidly simple notes app
DiffPDF
DiffPDF is used to compare two PDF files.
Write
Write is a word processor for handwriting.
SimpleNote
The simplest way to keep notes
Persepolis
Persepolis is a download manager & a GUI for Aria2.
OCRFeeder
OCRFeeder is a document layout analysis and optical character recognition system.
Meld
Meld is a visual diff and merge tool targeted at developers.
GTG
(GTG) is a personal tasks and TODO-list items organizer for the GNOME desktop environment