All in all, these are great open source alternative to WinRAR software that anyone can use for free. Some additional tools like Archive Viewer, Checksum Calculator, etc., are also provided in a few software. Almost all of these software also let you extract different types of archives. Plus, some of these also provide you Archive Encryption feature using which you can password protect resulting archive. To create archive, you can set up multiple output options like Compression Method (LZMA, LZMA2, PPMd, BZip2, etc.), Compression Level, Speed, and more. These WinRAR alternatives let you create archive of several formats including 7Z, TAR, ZIP, WIM, BZip2, etc. You can study and modify the source code of these software without any restriction.

These are also open source file archivers that provide their source code along with their setup files. As it is a paid software, I have created a list of free software that you can use in place of WinRAR. WinRAR is a famous file archiving software that allows you to create as well as extract archives of multiple types. Here is a list of Best Free Open Source WinRAR Alternative for Windows.

Winrar free