Qt

If you'd rather stick to Visual Studio, this add-in will let you do that.

Nobody seems to talk about this, but Qt also provides a way to write an installer for your application. Does not support creation of macOS disk images, app bundles, or Linux packages, so be mindful of that when considering your project's distribution.

If QML is more your style, consider this alternative build system.

Command-line tool that prints out a lot of information pertaining to both your Qt installation and your system in general. No link because there's no dedicated web page; just run qtdiag on the command line. Excellent for troubleshooting.

The bundled build system designed for Qt, though it can be used for non-Qt projects.

Lets you make easing curves suitable for QML, though if you understand the underlying math there's no reason you couldn't use the resulting numbers elsewhere.

Powerful debugger and general inspection tool for Qt-built software. Lets you inspect and manipulate the QObject hierarchy, view object properties, edit widgets at runtime, and far, far more. A two-sentence blurb can't do it justice, seriously check it out.

Alternative implementation of moc that's binary-compatible with Qt's version.

Inspection tool with similar goals to GammaRay, though much simpler.

Lets you bundle your Qt based application as an AppDir or AppImage, making it possible to ship it to users of many desktop Linux distributions. Similar to the official windeployqt and macdeployqt tools but for Linux.

Dependency manager for Qt / C++.

I've never heard of this language either, honestly.

Experimental wrapper for Qt that allows it to be used by .NET-based languages such as C#. Young, but active.

Qt wrapper for the MuPDF PDF viewer.

OpenAL wrapper designed for games, with stb_vorbis and libsndfile support.

Add Font Awesome icons to your Qt application. Other icon sets are supported, too.

Use Ruby as a scripting language within your application.

Wrapper for libvlc that lets you add a VLC-like media player to your application.

Qt & QML wrapper for ZXing-C++ Library with ready-made QML items for decoding and generating 1D and 2D barcodes (aka. QR codes).

Cross-platform IRC framework. We've got enough IRC clients out there already, but I suppose this could also be used to implement a chat function in your application (e.g. for community support).

Web framework that takes some ideas from Perl's Catalyst framework.

Dice Roller framework based on its own syntax.

Binding for QML in C, primarily designed as an API for other languages to support QML.

Convert images from any Qt-supported format to OpenGL-format textures. Useful for speeding up texture loading in graphics applications.

Django-inspired text templating.

Dependency injection for Qt.

Embed a hex editor in your application.

Material Design implemented in QML.

Widget that lets you create and edit nodes in a graph similar to the kind provided by Unreal Engine, Substance Designer, or PureData.

Let your application update itself.

Fans of type theory will enjoy these sum and optional types.

Render Mustache templates.

Actively developed multimedia framework.

Powerful set of libraries that provide GUI, logging, testing, configuration, and project functionality (among other things) for your application.

Notification framework.

Make your application capable of anything.

Create regular expressions using natural English expressions. Part of the VerbalExpressions project, which does the same thing for a wide variety of languages.

If you need to write a web application server in Qt for some reason, this'll help you along.

Read and write spreadsheets in Microsoft Excel format.

Experimental library to write Qt applications without using the moc.

I want to make my application do more than once thing at once. What could possibly go wrong? Talk given at QtCon 2016 by Giuseppe D'Angelo.

How to make your Qt application faster, Linux-style. Talk given at QtCon 2016 by Milian Wolff.

Talk about GammaRay and how it can help you dissect your Qt applications. Talk given at QtCon 2016 by Volker Krause.

I want to make my application do more than once thing at once. What could possibly go wrong? Talk given at QtCon 2016 by Giuseppe D'Angelo.

How to make your Qt application faster, Linux-style. Talk given at QtCon 2016 by Milian Wolff.