Adding "Fusion OS: Writing an OS in Nim", and organizing alphabetically.

README.md

@@ -119,6 +119,7 @@ It's a great way to learn.
 
 #### Build your own `Command-Line Tool`
 
+* [**Dart**: _Make a weather app with Dart_](https://meamka.me/posts/make-a-weather-app-with-dart/)
 * [**Go**: _Visualize your local git contributions with Go_](https://flaviocopes.com/go-git-contributions/)
 * [**Go**: _Build a command line app with Go: lolcat_](https://flaviocopes.com/go-tutorial-lolcat/)
 * [**Go**: _Building a cli command with Go: cowsay_](https://flaviocopes.com/go-tutorial-cowsay/)
@@ -260,8 +261,10 @@ It's a great way to learn.
 * [**Python**: _Neural Networks: Zero to Hero_](https://www.youtube.com/playlist?list=PLAqhIrjkxbuWI23v9cThsA9GvCAUhRvKZ)
 
 #### Build your own `Operating System`
-_For more general information, see OSDev.org_
+_For more general information, see OSDev.org and OSDev.wiki_
 
+* [**(any)**: _Making Simple Graphical Linux Distro from Scratch_](https://www.youtube.com/watch?v=guSDz5Iwgw0) [video]
+* [**(any)**: _Linux from scratch_](https://linuxfromscratch.org/lfs)
 * [**Assembly**: _Writing a Tiny x86 Bootloader_](http://joebergeron.io/posts/post_two.html)
 * [**Assembly**: _Baking Pi – Operating Systems Development_](http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/index.html)
 * [**C**: _Building a software and hardware stack for a simple computer from scratch_](https://www.youtube.com/watch?v=ZjwvMcP3Nf0&list=PLU94OURih-CiP4WxKSMt3UcwMSDM3aTtX) [video]
@@ -273,22 +276,22 @@ _For more general information, see OSDev.org_
 * [**C**: _Kernel 201 – Let’s write a Kernel with keyboard and screen support_](https://arjunsreedharan.org/post/99370248137/kernel-201-lets-write-a-kernel-with-keyboard)
 * [**C**: _Build a minimal multi-tasking kernel for ARM from scratch_](https://github.com/jserv/mini-arm-os)
 * [**C**: _How to create an OS from scratch_](https://github.com/cfenollosa/os-tutorial)
-* [**(any)**: _Making Simple Graphical Linux Distro from Scratch_](https://www.youtube.com/watch?v=guSDz5Iwgw0)
 * [**C**: _Malloc tutorial_](https://danluu.com/malloc-tutorial/)
 * [**C**: _Hack the virtual memory_](https://blog.holbertonschool.com/hack-the-virtual-memory-c-strings-proc/)
 * [**C**: _Learning operating system development using Linux kernel and Raspberry Pi_](https://github.com/s-matyukevich/raspberry-pi-os)
 * [**C**: _Operating systems development for Dummies_](https://medium.com/@lduck11007/operating-systems-development-for-dummies-3d4d786e8ac)
 * [**C++**: _Write your own Operating System_](https://www.youtube.com/playlist?list=PLHh55M_Kq4OApWScZyPl5HhgsTJS9MZ6M) [video]
 * [**C++**: _Writing a Bootloader_](http://3zanders.co.uk/2017/10/13/writing-a-bootloader/)
+* [**Nim**: Fusion OS: Writing an OS in Nim](https://0xc0ffee.netlify.app/osdev/)
 * [**Rust**: _Writing an OS in Rust_](https://os.phil-opp.com/)
 * [**Rust**: _Add RISC-V Rust Operating System Tutorial_](https://osblog.stephenmarz.com/)
-* [**(any)**: _Linux from scratch_](https://linuxfromscratch.org/lfs)
 
 #### Build your own `Physics Engine`
 
 * [**C**: _Video Game Physics Tutorial_](https://www.toptal.com/game/video-game-physics-part-i-an-introduction-to-rigid-body-dynamics)
-* [**C++**: _Game physics series by Allen Chou_](http://allenchou.net/game-physics-series/)
+* [**C++**: _Create a 2D Physics Engine_](https://thevoxium.github.io/posts/stellar-engine/)
 * [**C++**: _How to Create a Custom Physics Engine_](https://gamedevelopment.tutsplus.com/series/how-to-create-a-custom-physics-engine--gamedev-12715)
+* [**C++**: _Game physics series by Allen Chou_](http://allenchou.net/game-physics-series/)
 * [**C++**: _3D Physics Engine Tutorial_](https://www.youtube.com/playlist?list=PLEETnX-uPtBXm1KEr_2zQ6K_0hoGH6JJ0) [video]
 * [**JavaScript**: _How Physics Engines Work_](http://buildnewgames.com/gamephysics/)
 * [**JavaScript**: _Broad Phase Collision Detection Using Spatial Partitioning_](http://buildnewgames.com/broad-phase-collision-detection/)
@@ -464,7 +467,7 @@ _For more general information, see OSDev.org_
 * [**PHP**: _Code a Web Search Engine in PHP_](https://boyter.org/2013/01/code-for-a-search-engine-in-php-part-1/)
 * [**Python**: _Build a Deep Learning Library_](https://www.youtube.com/watch?v=o64FV-ez6Gw) [video]
 * [**Python**: _How to Build a Kick-Ass Mobile Document Scanner in Just 5 Minutes_](https://www.pyimagesearch.com/2014/09/01/build-kick-ass-mobile-document-scanner-just-5-minutes/)
-* [**Python**: _How to build your first error-correction code in vanilla Python][(http://aosabook.org/en/500L/a-continuous-integration-system.html](https://quantum-for-the-confused.medium.com/building-your-first-error-correction-code-in-python-4c1da6d56876))
+* [**Python**: _How to build your first error-correction code in vanilla Python](https://quantum-for-the-confused.medium.com/building-your-first-error-correction-code-in-python-4c1da6d56876)
 * [**Python**: _Continuous Integration System_](http://aosabook.org/en/500L/a-continuous-integration-system.html)
 * [**Python**: _Recommender Systems in Python: Beginner Tutorial_](https://www.datacamp.com/community/tutorials/recommender-systems-python)
 * [**Python**: _Write SMS-spam detector with Scikit-learn_](https://medium.com/@kopilov.vlad/detect-sms-spam-in-kaggle-with-scikit-learn-5f6afa7a3ca2)