I wrote a web version of Reverse (Othello) in ReactJS using Typescript:

http://reversi.gregdonald.com/

I wrote a web version of Blackjack in ReactJS/Typescript:

http://blackjack.gregdonald.com/

I wrote a console version of Blackjack in Python 3:

https://github.com/gdonald/blackjack-py

I wrote a GUI version of Blackjack in C using the SDL2 graphics library:

https://github.com/gdonald/blackjack-c-sdl

I wrote a customer relationship management tool in Ruby on Rails:

https://crm12.com/

You can manage customers, sales, and products.  It also has custom fields you can attach to products.

Here's a how-to for building a recent Linux kernel on your Debian GNU/Linux box: You will need to do all this as root. It's serious business building new Linux kernels :) su - The dash after the su command makes it behave as if you had logged in as root directly, a full login environment is applied. Make sure you have the required tools and libraries installed: apt-get install build-essential module-init-tools initramfs-tools procps libncurses5-dev kernel-package fakeroot git-core screen zlib1g-dev Use git to clone Linus' latest git repo: cd /usr/src git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git This will take a long time: Cloning into 'linux'... remote: Counting objects: 2725713, done. remote: Compressing objects: 100% (412816/412816), done. remote: Total 2725713 (delta 2286272), reused 2725359 (delta 2285962) Receiving objects: 100% (2725713/2725713), 559.28 MiB | 3.30 MiB/s, done. Resolving deltas: 100% (2286272/2286272), done. Once you

I wrote a console version of Blackjack in C:

https://github.com/gdonald/blackjack-c

CREATE DATABASE _ WITH ENCODING 'UTF8' OWNER _ LC_COLLATE 'en_US.UTF-8' LC_CTYPE 'en_US.UTF-8' TEMPLATE template0;

I wrote a console version of Blackjack in C++:

https://github.com/gdonald/blackjack-cpp

I wrote a console version of Blackjack in Perl 6:

https://github.com/rakuist/Console-Blackjack

and released it as module:

Console::Blackjack