What are some alternatives?
When comparing UnRarX and PeaZip, you can also consider the following products
WinRAR - WinRAR is a powerful archive manager.
Bandizip - Bandizip : All-In-One Free Zip Archiver. Bandizip is a lightweight, fast and free All-In-One Zip Archiver.
FreeArc - FreeArc is a free and open source file archiver developed by Bulat Ziganshin.
The Unarchiver - Get the top application for archives on Mac. It's a RAR extractor, it allows you to unzip files, and works with dozens of other formats.
File Roller - File Roller is an archive manager for the GNOME desktop environment.
WinZip - The world's best file compressor in the world.