Wee Puzzles - 50 fun puzzles for kids with animals, pirates, dinos, trains
fish shell - The friendly interactive shell.
Pixelogic - Daily Picross - Nonogram logic game with 5000+ puzzles and a daily puzzle
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.
LogicLike - Improve logical thinking through engaging brain games
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.