PeaZip: archive manager

PeaZip aims to be an advanced archive manager that’s also easy to use, and it does this extremely well. Not only does it support a ton of different file formats and security features (like encryption and integrity checks), but it has a very straightforward GUI that even beginners should find self-explanatory. Its interface is also very configurable, and if you head into the preferences, you have a lot of choices in how you want to use the program. There is also a portable version which doesn’t require installation.