QArchive 
QArchive is a cross-platform C++ library that modernizes libarchive , This library helps you to extract and compress archives supported by libarchive. The whole library itself is crafted to work perfectly well with the Qt event loop and thus its a perfect fit for your Qt projects.
I personally made this project to extract .7z archives in order to create a library that can update Qt Apps installed via Qt Installer Framework without using the updater tool provided by Qt , because I hated using sub-process and besides I wanted a in-built updater for my application and that's not possible with the already provided updater from Qt Installer Framework.
Features
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Single threaded and Non-Blocking API - Using Qt's Event Loop. (you can optionally run in a different thread)
-
Easy to Use API - Made some effort to match Qt's style.
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Cyclic API , No use of mutex - The whole library is fully cyclic and therefore no mutex is used.(Only signals and slots.)
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Drink the Qt Kool-aid - In a positive way.
Witness it with your own eyes,
#include <QCoreApplication>
#include <QArchive/QArchive>
int main(int argc, char **argv)
{
using QArchive::DiskExtractor;
QCoreApplication app(argc, argv);
DiskExtractor Extractor("Test.7z");
/* Connect Signals and Slots. */
QObject::connect(&Extractor ,
&DiskExtractor::finished ,
&app ,
&QCoreApplication::quit);
Extractor.start();
return app.exec();
}
Getting Started
Learn more about QArchive at the official documentation.
Conan
Thanks to Eric Riff.
Starting from version 2.0.1 QArchive is available on the Conan C/C++ package manager, which means you can download prebuilt packages for all major platforms (Windows, Linux, macOS, etc).
Find an example on how to consume Conan's precompiled packages in the examples folder.
Contributors 
My utmost gratitude goes to these people!
You can also become one of them by contributing to this project , to know more read CONTRIBUTING.md.
Thank You 
I really need to thank the developers of these libraries for creating it because QArchive is elegant because of them!
Support 
If you think that this project is cool then you can give it a
License
The BSD 3-clause "New" or "Revised" License.
Copyright (C) 2017-present, QArchive Contributors and Antony J.R
All Rights Reserved.