This page contains a list of Qt4 and Qt5 based applications/programs. Some programs are also non-GTK3 and non-GTK2 based.

Please search for the application name in your Manjaro repository. If you cannot find it, try the Arch User Repository as well. Sometimes, packages need to be downloaded from github or the developer website and installed manually.

Internet

Web Browsers

qupzilla - QtWebkit browser, really usable after 1.1.8.
Otter Browser - Otter Browser aims to recreate the best aspects of the classic Opera (12.x) UI using Qt5
qutebrowser - A keyboard-driven, vim-like browser based on PyQt5 and QtWebKit.
lightweight2 - Very small browser using Qt libraries
QTbrowser - simple Qt Browser for Qt 4 and 5
slimboat - Fast,free secure and powerful web browser based on QtWebkit.

Email Client

Trojita - An IMAP email client
manitou-ui - Database-driven email system: user interface

IM/IRC clients

Quassel - Daemon-based IRC client
Psi - IM app (XMPP only; slow development)
QutIM - IM app (XMPP + other protocols)
Kadu - XMPP and Gadu-Gadu IM.
Licq - Advanced graphical ICQ clone
kvirc - Qt-based IRC client

Twitter Clients

Qwit - a client for Twitter
Qtwitter - Twitter Client
Hotot-qt - A lightweight & open source microblogging software (twitter identi.ca).

Bittorrent Clients

qBittorrent - An advanced P2P bittorrent client.
transmission-qt - Fast, easy, and free BitTorrent client.
qtorrent - A Bittorrent Qt GUI

Web Applications

Clipgrab - A video downloader and converter for YouTube, Veoh, DailyMotion, MyVideo,etc.
Minitube - A native YouTube client in Qt. Watch YouTube videos without Flash Player.
Qsopcast - A front-end to p2p TV sopcast
Rssguard - RSS 0.92/1.0/2.0 & ATOM 1.0 feed reader (QtDesktop)
quiterss - Fast and light RSS/Atom feed reader written on Qt/С++
weboob - Web Out Of Browsers provides several applications to interact with a lot of websites.
fatrat - Qt4 based download manager with support for HTTP, FTP, SFTP, BitTorrent, rapidshare and more

FTP Software

qftp - A Qt client for FTP file transfer.
FileZilla - Fast and reliable FTP, FTPS and SFTP client

Online Storage & Data Backup

LuckyBackup - Backup & Sync tool
spideroak - Secure and consolidated free online backup, storage, access, sharing & sync tool for Windows, Mac OS X, and Linux.

Multimedia

Media Players

Smplayer - the original fully-featured Qt4/5 frontend for mplayer/mplayer2
mpv - A media player based on MPlayer and mplayer2. It supports a wide variety of video file formats, audio and video codecs, and subtitle types.
VLC - Standalone media player
QMPlay2 - It can plays all formats and stream supported by ffmpeg and libmodplug. It has integrated Youtube browser.
Xt7-player - Xt7 is an mplayer gui that aims to be a complete interface to its tons of options coded keeping usability in mind.
umplayer - A complete front-end for MPlayer
Baka MPlayer - Baka MPlayer is a free and open source, cross-platform, mpv based multimedia player.

Music Players

Cantata - Extremely featureful MPD client, with Qt4 and Qt5 interfaces.
Clementine - modern music player and library organiser inspired by Amarok 1.4.
YaRock - Modern Music Player with collection browser based on cover art.
Tomahawk - The social media player.
Musique - Music player with a clean and innovative interface.
Qmmp - Audio-player, the user interface is similar to winamp or xmms.
Quimup - A client for the Music Player Daemon (MPD) written in C++ and Qt
Sayonara Player - Sayonara is a small, clear and fast audio player for Linux
cuberok - Yet another music player based on Qt4.
knowthelist - the awesome party music player.
deadbeef-qt - Qt based user interface plugin for DeaDBeeF music player.

Audio Tools

qasmixer - sound mixer/volume handler (QtDesktop)
EKO - EKO is a simple sound editor
Flacon - Tool to extract individual tracks from one big audio file.
Qtractor - An audio/MIDI multi-track sequencer application
Kid3 - Audio files tagger
mixxx - Digital DJ mixing software
traverso - Digital Audio Workstation with an innovative User Interface
qoobar - Audio Tagger for Classical Music. It can - Edit ID3v2.4, Xiph.org, APE, ASF tags.
rosegarden - MIDI/audio sequencer and notation editor

Image Viewers

PhotoQt - A fast, simple, good looking, yet powerful and highly configurable image viewer.
Qiviewer - A Qt image viewer, designed to be fast and lightweight.
LXImage-Qt - The image viewer and screenshot tool for LXQt.
Nomacs - nomacs is a free image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images.
limoo - A multiplatform and modern image viewer, focused on better user interface...
qimageviewer - Image Viewer on Qt.
phototonic - Image Viewer and Organizer

Image Editors

EasyPaint - Simple image editor
Pencil - Animation/drawing software
LazPaint - Image editor, like PaintBrush or Paint.Net, written in Lazarus (Free Pascal). Includes BGRABitmap, a set of drawing routines.
Ardoise - The Ardoise ("The Slate") is an open-source software to draw, write and erase on an infinite area, then to save only the part you want.

CAD Software

LibreCAD - 2D-CAD application
freecad - A general purpose 3D CAD modeler

Graphic Tools

Converseen - image converter and resizer
Sir - Simple image resizer in qt4
Screengrab - Screenshot application (QtDesktop)
hotshots - HotShots is an application for grabbing screens and saving them in a variety of image formats as well as adding annotations and graphical data (arrows, lines, texts, ...).
Scribus - A desktop publishing program
Fotowall - A tool for rendering collages from photos or pictures
Luminancehdr - graphical user interface application that aims to provide a workflow for HDR imaging
Posterazor - PosteRazor cuts a raster image into pieces which can be printed and assembled to a poster.
Trimage - A GUI based lossless image compressor.

Video Editors

Avidemux-qt - A graphical tool to edit video (QtDesktop)
ffdiaporama - Creation of videos sequences from images, titles, music
hybrid-encoder - A very complete gui for video encoding.
Shotcut - a free, open source, cross-platform video editor

Media Converter

makemkv - DVD/Bluray to MKV convertion tool
curlew - Easy to use, Free and Open-Source Multimedia converter for Linux in Python
Feff - Qt frontend for FFmpeg.
qwinff - another frontend QT for ffmpeg
FF Multi Converter - Multi Converter is a GUI application that converts multiple file formats to different extensions
Outreel - Outreel is fast and esasy to use video converter from Icefeast.its a beast ffmpeg frondend for your linux system

CD burning application

qmultirecord - CD, DVD and BD recording frontend for cdrskin. Allows to simultaneously burn (and check) multiple ISO files in multithread mode on several optical drives.
Silicon Empire - Set of tools to Burn, Copy, Backup, Manage your optical discs like CDs, DVDs and Blu-Rays.

Documents and Texts

Text Editors

Juffed - text editor (QtDesktop)
Notepadqq - a Notepad++-like editor for the Linux desktop.
Tea - text editor with an ultimate small sizethat provides you hundreds of functions.
Qedit - A modern, standalone and multi-purpose text editor.
Vim-qt - An experimental Qt gui for Vim
Texmaker - latex editor
FocusWriter - A simple fullscreen word processor
Qxmledit - A simple XML editor written in Qt4
Lyx - An advanced WYSIWYM document processor & LaTeX front-end
Plume Creator - With Plume Creator, organize your writing projects ! Scenes, notes, characters,... Rich Text editing, full screen editing and multiple projects supported.
qscite - A code editor written in C++ and Qt4; A clone of SciTE
mdiedit - Simple text editor with MDI interface. Written in qt5.
QScintilla - A port to Qt3 of Neil Hodgson's Scintilla C++ editor class

Notes Managment

ZNotes - Lightweight application for notes managment with simple interface
Basqet - A note-taking application similar to Basket
LoNote - A simple and fast note-taking application using Webkit engine and is written by PyQt.
QtNote - Note-taking application written with Qt in mind and able to read tomboy notes
qtodotxt - A cross-platform UI client for todo.txt files (see todotxt.com).

eBook Managers & Readers

Calibre - Ebook management application.
fbreader - An e-book reader for Linux
coolreader3 - E-Book viewer for comfort reading (epub (non-DRM), fb2, txt, rtf, html, chm, tcr formats supported)

PDF viewers

qpdfview - A tabbed PDF viewer using the poppler library.
PdfViewer - A simple program for viewing PDF files.

Dictionaries

goldendict - dictionary
qstardict - dictionary (QtDesktop)

Utilities

Package Managers

Octopi - Powerful Pacman (GUI | frontend) written in Qt
pacmanxg - Yet another GUI for pacman and yaourt. Depends neither on GTK nor Qt, only X11.
tkpacman - A lightweight GUI for pacman built with Tcl/Tk

IDEs

rstudio - An integrated development environment (IDE) for R (binary version from RStudio official website)
monkeystudio - Crossplatform IDE written in C++/Qt4
QtCreator - Lightweight, cross-platform integrated development environment

File Managers

Andromeda - Cross-platform file manager, written on Qt (QtDesktop)
Qtfm - Tabbed FM with Bookmarks support
Newbreeze - Fast and light-weight File Manager (Qt4)
Hamsimanager - Hamsi Manager is a file manager, renamer, id3 tagger, information changer, ... tool.
doublecmd - powerful double panel cross platform file manager, written in Object Pascal / Lazarus, which uses couple of toolkits for UI includes Qt
yefm - Simple file manager based on Qt
dino-dfm - A Qt Simple File Manager
bsc - A file manager for Linux based on Qt-GUI

Archivers

peazip-qt - Free, Open Source file and archive manager. Supports 7Z, ACE, ARC, CAB, ISO, PAQ, PEA, RAR, TAR, ZIP and many more archive formats.
b1 free archiver - Most friendly and simple free file archiver

Terminal emulators

qterminal - terminal emulator (maintainer: pvanek, QtDesktop)
cool-retro-term - A good looking terminal emulator which mimics the old cathode display...

Scaning Tools

QScanner - Simply tool based on libksane widget to scan images and allows to save to basic graphics format and to pdf (also multiply images to one pdf file)
Vaultaire - Document scanning and tagging front-end built on Qt/C++
gbscan - Gambas gui to scanimage

Iso Tools

Acetoneiso2 - An all in one ISO tool
qisousb - A graphical Qt tool to copy a hybrid ISO onto a USB key.

More Utilities

dnetstats - Graphic monitor for the network. Show the network stats and the netmap
copyq - clipboard manager with searchable and editable history.
Qlipper - clipboard manager (maintainer: pvanek, QtDesktop)
CMST - GUI for connman (connman is a replacement for NetworkManager with any GTK+ dependencies)
TinyMount - is a little GUI tool for mount/unmount devices, using UDisks and Qt.
easymount - Qt Device Mounter. It depends on pmount.
ldm - A lightweight device mounter
keepassx - Cross platform password manager
qpass - Easy to use password manager with built-in password generator
ptbatterysystemtray - power management (QtDesktop)
QBat - A small tool based on Qt4 to display battery stats in system tray
Qps - Process manager. Development is dead.
Top - windowed version of the console top command.
qxkb - keyboard layout/language switcher (QtDesktop)
searchmonkey - A powerful GUI search utility for matching regex patterns
recoll - Full text search tool based on Xapian backend.
QGMailNotifier - A GMail notifier.
Xgrabcolor - A basic color picker
Taskbar - a transparent taskbar to collect users favorite applications and run them in a simple click.
Transparency - a set of transparent applications.
Qx11grab - Qt4 applet for recording x11 windows with ffmpeg.
kapow - Punch clock to track time spent on projects
qarma - Zenity Clone for Qt4/Qt5
QNetCtl - Qt GUI for netctl
yapan - Yet Another Package mAnager Notifier.
Skippy-XD - Skippy-XD is a full-screen task-switcher for X11.
lxmixer - a Qt fork of pavucontrol
YaNMa - Yet another NetworkManager applet written in PyQt.
qt5ct - Qt5 Configuration Utility (requires Qt platform theme to be set to qt5ct)
qtpanel - A project to create useful and beautiful panel in Qt

Scientific Applications

avogadro - An advanced molecular editor
SpeedCrunch - a fast, high precision and powerful desktop calculator.
convertall - Unit conversion program
mendeleydesktop - Academic software for managing and sharing research papers (desktop client).
KLatexFormula - KLatexFormula is a program to easily get an image from a LaTeX formula .
qtoctave - qt frontend for octave.
extcalc - A multifunctional scientific graphic calculator
rpcalc - A simple reverse polish notation calculator
qtgrace - A program to display or plot data, analyze data and prepare it for printing, Qt version of the Grace
qtiplot - Data analysis and scientific plotting - free clone of Origin
scidavis - Application for Scientific Data Analysis and Visualization, fork of QtiPlot

Games

Hugor loader - Hugor is a cross-platform port of the Hugo Engine eaning which you can load and play adventure games created with Kent Tessman’s Hugo authoring system.
ColorCode - a free advanced MasterMind clone
PEG-E - solitare game where you jump over pieces in order to remove them from the board.
OpenGOO - a free and open port of World of goo.
GLPeces - create different figures by putting together pieces like squares, triangles, rectangles, and others
Chessx - operate on your collection of chess games in many ways: browse, edit, add, organize, analyze, etc.
yabause-qt - A Sega Saturn emulator with Qt interface.
CuteMupen - Mupen64plus (v2) frontend emulator for N64 roms
bsnes - Super Nintendo Entertainment System (SNES) emulator focused on accuracy.
Gottet - A Qt4 tetris game
Connectagram - A word unscrambling game
Simsu - A basic Sudoku game

Misc

q4wine - GUI for Wine
2mandvd - DVD Authoring Maker In Linux Environment.
musescore - A music score editor written in Qt
vidalia - Controller GUI for Tor
lmms - The Linux MultiMedia Studio.
scantailor - Interactive post-processing tool for scanned pages
Synkron - A folder synchronization tool
coquillo - Edit metadata / tags of various audio formats like MP3, Ogg/Vorbis and FLAC.
lrcshow-x - A lyrics plugins, supporting Amarok2, Qmmp, and other Linux Players with full dbus interface functions
qpxtool - Open Source Solution which intends to give you access to all available Quality Checks
kdiff3 - A file comparator/merge tool
kchmviewer - A .chm files (MS HTML help file format) viewer .
cuneiform-qt - Qt4-based GUI for Cuneiform OCR.
qdvdauthor - 'Q' DVD-Author is a Qt-based DVD authoring suite.
git-cola - A powerful GUI for Git.
cdcat - CD/DVD/Media catalog software (Qt based).
Qcomicbook - A viewer for comic book archives
symphytum - Personal database software
Qtparted - A Partition Magic clone to graphically manipulate partitions
QHexEdit - QHexEdit is a hex editor widget written in C++ for the Qt (Qt4) framework.
moneychanger - A QT/C++ client for Open-Transactions
higan - Nintendo multi-system emulator
bitcoin-qt - Bitcoin is a peer-to-peer network based digital currency - Qt
simplescreenrecorder - A feature-rich screen recorder that supports X11 and OpenGL.

Sources

Most applications are taken from: https://github.com/Razor-qt/razor-qt/wiki/3rd-party-applications.

Almost all programs mentioned in this Manjaro Forum thread are included, too: https://forum.manjaro.org/index.php?topic=14229.0

Furthermore, applications from this Arch Wiki page have been included: https://wiki.archlinux.org/index.php/User:Alexfikl/Qt_Apps

Links

You can find other wiki pages about Qt and LXQt here.