
QtiPlot
Analyze and plot scientific data
Qtractor
Qtractor is an Audio/MIDI multi-track sequencer application
QTScrobbler
QTScrobbler is tool for submitting .scrobbler.log from portable players to Last.fm

QtSmbstatus Client
QtSmbstatus is a GUI (graphical user interface) for smbstatus
QtSmbstatus Light
QtSmbstatus is a GUI (graphical user interface) for smbstatus
Quassel IRC (Client only)
Distributed IRC client with central core component
Quassel IRC
Distributed IRC client with central core component

QuiteRSS
QuiteRSS is a RSS/Atom feed reader written in C++/Qt

QuteCom
Talk to people over the Internet and send instant messages over multiple protocols
qutIM
Communicate over IM
QViaggiaTreno
Interfaccia grafica per ViaggiaTreno

QWBFS Manager
QWBFS Manager is a graphical user interface (GUI) for working with WBFS filesystem formatted hard disk drive.
Razor Appearance Configuration
Configure appearance of Razor desktop
Razor Shortcut Configuration
Configure global shortcut of Razor desktop

Razor Mouse Configurator
Configure X11 mouse
Razor Freedesktop Notifications Configuration
Configure freedesktop notifications in Razor desktop
Qt Configuration
Configure Qt
Razor Configuration Center
Configure Razor-Qt modules
Razor Desktop Configurator
Configure Razor-Qt desktop module

Razor Session Configurator
Configure Razor-Qt session module

Regina
Software for low-dimensional topology
Rocs
Graph Theory Tool for Professors and Students.

RSIBreak
Makes sure you rest now and then
samplv1
samplv1 is an old school polyphonic sampler
SciDAVis
Application for scientific data analysis and visualization

ScreenGrab
Screen capture

Semantik
A mind-mapping tool for KDE

ShelXle
A Qt GUI for SHELX
showFoto
Manage your photographs like a professional with the power of open source

Simon
Speech Recognition and Model Management

Skanlite
Scan and save images
skrooge
Skrooge is a personal finances manager powered by KDE, aiming at being simple and intuitive.

Smb4K
Advanced Network Neighborhood Browser
SMPlayer
A great MPlayer front-end

YouTube Browser for SMPlayer
Browse and search from YouTube

SMTube
Browse and search videos from YouTube
Source-Highlight-IDE
Develop, modify or debug a source-highlight definition file

SpeedCrunch
A high-precision scientific calculator

Spyder
The Scientific Python Development Environment