LibriVox - free public domain audiobooks
fish shell - The friendly interactive shell.
Audible - Audible is the world’s largest provider of premium audiobooks and spoken word content.
zsh - The Z shell (Zsh) is a Unix shell that can be used as an interactive login shell and as a powerful command interpreter for shell scripting.
Mobilism.org - A home for book lovers, app enthusiasts, and much more.
PowerShell Plus - Learn how to learn and master PowerShell fast with an interactive learning center, a powerful IDE, pre-loaded scripts, and a PowerShell Editor… all for free.