ZFS Snapshot Manager

https://zsm.rtfd.io/

Interactively transferring files to a remote machine while using ssh

http://zssh.sourceforge.net/

Fast real-time compression algorithm

https://facebook.github.io/zstd/

C++ header-only ZLib wrapper

https://github.com/mateidavid/zstr

A file transfer program

http://zsync.moria.org.uk/

Platform-independent object-oriented C++ threading library

http://zthread.sourceforge.net/

GUI toolkit heavily inspired by GTK

https://git.zrythm.org/zrythm/ztoolkit

Display ZFS dataset I/O in real time

https://github.com/asomers/ztop

Simple ncurses based pseudo-3D driving game

Utilities for searching in bzip2, gzip, lzip, and xz archives

http://www.nongnu.org/zutils/zutils.html

Easily and reliably transfer ZFS filesystems

https://github.com/allanjude/zxfer

C++ library for linear/matrix barcode recognition

https://github.com/zxing-cpp/zxing-cpp

ZFS Administration GUI

https://github.com/manoeldesouza

Framework for proximity-based peer-to-peer applications

https://github.com/zeromq/zyre

Library to provide transparent read access to zipped files

https://github.com/gdraheim/zziplib