[mrsaint]

I tried Peazip for Linux but it didn't quite work for me. I remember it as kinda buggy, and anyhow, it works like a Gui wrapper that uses external console binaries to perform actual compression/decompression tasks rather than having the routines built-in.

Regarding zstd: I would love to use it cross-platform, but zstd for Windows is still kinda exotic, and yes, it misses proper Gui applications. Now, if Winrar would support zstd... :P :P