Simple music synthesizer app (like a toy-piano), but based on usual qwerty-keyboard for input.
Link
It’s an app where you do maths like a normal person. It lets you type whatever you want and smartly figures out what is math and spits out an answer on the right pane. Then you can plug those answers in to future equations and if that answer changes, so does the equations it’s used in.
Briar
Secure messaging, anywhere.Peer-to-peer encrypted messaging and forums.
F3D
F3D is a VTK-based 3D viewer following the KISS principle, so it is minimalist, efficient, has no GUI, has simple interaction mechanisms and is fully controllable using arguments in the command line.
SimpleNote
The simplest way to keep notes
Pebbles
An easy to use yet powerful calculator app
Ulauncher
Application launcher for Linux
Curlew
Curlew is an easy to use, Free and Open-Source Multimedia converter for Linux.
Gaia Sky
Gaia Sky is a real-time, 3D, astronomy visualisation software
Pencil
The Pencil Project’s unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.