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README.md

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+# ![Build your own](feynman.png)
+
+* Build your own **3D Renderer**
+  * [**C++**: *Introduction to Ray Tracing: a Simple Method for Creating 3D Images*](https://www.scratchapixel.com/lessons/3d-basic-rendering/introduction-to-ray-tracing/how-does-it-work)
+  * [**C++**: *How OpenGL works: software rendering in 500 lines of code*](https://github.com/ssloy/tinyrenderer/wiki)
+  * [**Java + JavaScript**: *Build your own 3D renderer*](https://avik-das.github.io/build-your-own-raytracer/)
+  * [**Java**: *How to create your own simple 3D render engine in pure Java*](http://blog.rogach.org/2015/08/how-to-create-your-own-simple-3d-render.html)
+
+* Build your own **Blockchain** / **Cryptocurrency** 
+  * [**Ethereum**: *From “What is Blockchain?” to building a blockchain in less than an hour*](https://medium.freecodecamp.org/from-what-is-blockchain-to-building-a-blockchain-within-an-hour-4e738efc819d)
+  * [**Java**: *Creating Your First Blockchain with Java*](https://medium.com/programmers-blockchain/create-simple-blockchain-java-tutorial-from-scratch-6eeed3cb03fa)
+  * [**JavaScript**: *A cryptocurrency implementation in less than 1500 lines of code*](https://github.com/conradoqg/naivecoin)
+  * [**JavaScript**: *Build your own Blockchain in Javascript*](https://github.com/nambrot/blockchain-in-js)
+  * [**JavaScript**: *Learn & Build a Javascript Blockchain*](https://medium.com/digital-alchemy-holdings/learn-build-a-javascript-blockchain-part-1-ca61c285821e)
+  * [**Go**: *Building Blockchain in Go*](https://jeiwan.cc/posts/building-blockchain-in-go-part-1/)
+  * [**Python**: *Learn Blockchains by Building One*](https://hackernoon.com/learn-blockchains-by-building-one-117428612f46)
+  * [**Python**: *Build your own blockchain: a Python tutorial*](http://ecomunsing.com/build-your-own-blockchain)
+  * [**TypeScript**: *Naivecoin: a tutorial for building a cryptocurrency*](https://lhartikk.github.io/)
+
+* Build your own **Bot**
+  * [**Haskell**: *Roll your own IRC bot*](https://wiki.haskell.org/Roll_your_own_IRC_bot)
+  * [**Node.js**: *Creating a Simple Facebook Messenger AI Bot with API.ai in Node.js*](https://tutorials.botsfloor.com/creating-a-simple-facebook-messenger-ai-bot-with-api-ai-in-node-js-50ae2fa5c80d)
+  * [**Node.js**: *Why you should have your own Twitter bot, and how to build one in less than 30 minutes*](https://medium.freecodecamp.org/easily-set-up-your-own-twitter-bot-4aeed5e61f7f)
+  * [**PHP**: *Let’s write a cryptocurrency bot*](https://medium.com/@joeldg/an-advanced-tutorial-a-new-crypto-currency-trading-bot-boilerplate-framework-e777733607ae)
+  * [**Python**: *Step-by-Step Instructions for Building a Basic Facebook Chat Bot*](https://blog.hartleybrody.com/fb-messenger-bot/)
+  * [**Python**: *Build a Reddit Bot*](http://pythonforengineers.com/build-a-reddit-bot-part-1/)
+  * [**Python**: *How To Make A reddit Bot*](https://www.youtube.com/watch?v=krTUf7BpTc0)
+  * [**Python**: *How To Create a Telegram Bot Using Python*](https://khashtamov.com/en/how-to-create-a-telegram-bot-using-python/)
+  * [**Python**: *Create a Twitter Bot in Python Using Tweepy*](https://medium.freecodecamp.org/creating-a-twitter-bot-in-python-with-tweepy-ac524157a607)
+  * [**R**: *Build A Cryptocurrency Trading Bot with R*](https://towardsdatascience.com/build-a-cryptocurrency-trading-bot-with-r-1445c429e1b1)
+
+* Build your own **Database**
+  * [**C**: *Let's Build a Simple Database*](https://cstack.github.io/db_tutorial/)
+  * [**C++**: *Implementing a Key-Value Store*](http://codecapsule.com/2012/11/07/ikvs-implementing-a-key-value-store-table-of-contents/)
+  * [**C#**: *Build Your Own Database*](https://www.codeproject.com/Articles/1029838/Build-Your-Own-Database)
+  * [**Clojure**: *An Archaeology-Inspired Database*](http://aosabook.org/en/500L/an-archaeology-inspired-database.html)
+  * [**JavaScript**: *Dagoba: an in-memory graph database*](http://aosabook.org/en/500L/dagoba-an-in-memory-graph-database.html)
+  * [**Python**: *DBDB: Dog Bed Database*](http://aosabook.org/en/500L/dbdb-dog-bed-database.html)
+
+* Build your own **Front-end Framework** / **Library**
+  * [**JavaScript**: *A DIY guide to build your own React*](https://github.com/hexacta/didact)
+  * [**JavaScript**: *Reverse Engineering React*](https://vimeo.com/album/3930691)
+  * [**JavaScript**: *Building React From Scratch*](https://www.youtube.com/watch?v=_MAD4Oly9yg)
+  * [**JavaScript**: *Building Your Own React Clone in Five Easy Steps*](https://blog.javascripting.com/2016/10/05/building-your-own-react-clone-in-five-easy-steps/)
+  * [**JavaScript**: *Build your own Vuejs*](https://github.com/jsrebuild/build-your-own-vuejs)
+  * [**JavaScript**: *Build Yourself a Redux*](https://zapier.com/engineering/how-to-build-redux/)
+  * [**JavaScript**: *Let’s Write Redux!*](https://www.jamasoftware.com/blog/lets-write-redux/)
+  * [**JavaScript**: *Redux: Implementing Store from Scratch*](https://egghead.io/lessons/react-redux-implementing-store-from-scratch)
+  * [**JavaScript**: *Build Your own Simplified AngularJS in 200 Lines of JavaScript*](https://blog.mgechev.com/2015/03/09/build-learn-your-own-light-lightweight-angularjs/)
+  * [**JavaScript**: *How to write your own Virtual DOM*](https://medium.com/@deathmood/how-to-write-your-own-virtual-dom-ee74acc13060)
+
+* Build your own **Docker**
+  * [**C**: *Linux containers in 500 lines of code*](https://blog.lizzie.io/linux-containers-in-500-loc.html)
+  * [**Go**: *Building a container from scratch in Go*](https://www.youtube.com/watch?v=Utf-A4rODH8)
+  * [**Python**: *A workshop on Linux containers: Rebuild Docker from Scratch*](https://github.com/Fewbytes/rubber-docker)
+  * [**Shell**: *Docker implemented in around 100 lines of bash*](https://github.com/p8952/bocker)
+
+* Build your own **Game**
+  * [**C**: *Handmade Hero*](https://handmadehero.org/)
+  * [**C**: *How to Program an NES game in C*](https://nesdoug.com/)
+  * [**C**: *Chess Engine In C*](https://www.youtube.com/playlist?list=PLZ1QII7yudbc-Ky058TEaOstZHVbT-2hg)
+  * [**C**: *Let's Make: Dangerous Dave*](https://www.youtube.com/playlist?list=PLSkJey49cOgTSj465v2KbLZ7LMn10bCF9)
+  * [**C**: *Learn Video Game Programming in C*](https://www.youtube.com/playlist?list=PLT6WFYYZE6uLMcPGS3qfpYm7T_gViYMMt)
+  * [**C**: *Coding A Sudoku Solver in C*](https://www.youtube.com/playlist?list=PLkTXsX7igf8edTYU92nU-f5Ntzuf-RKvW)
+  * [**C**: *Coding a Rogue/Nethack RPG in C*](https://www.youtube.com/playlist?list=PLkTXsX7igf8erbWGYT4iSAhpnJLJ0Nk5G)
+  * [**C**: *Tutorial For a Brickout Clone*](https://dashgl.com/)
+  * [**C**: *A tutorials for a basic Invaders game made in C with GTK: and OpenGL*](https://dashgl.com/Invaders/)
+  * [**C**: *Astroids Tutorial written in C using GTK with OpenGL and DashGL for matrix manipulation*](https://dashgl.com/Astroids/)
+  * [**C++**: *How To Make Minecraft in C++/ OpenGL*](https://www.youtube.com/playlist?list=PLMZ_9w2XRxiZq1vfw1lrpCMRDufe2MKV_)
+  * [**C++**: *Breakout*](https://learnopengl.com/In-Practice/2D-Game/Breakout)
+  * [**C++**: *Beginning Game Programming v2.0*](http://lazyfoo.net/tutorials/SDL/)
+  * [**C#**: *Learn C# by Building a Simple RPG*](http://scottlilly.com/learn-c-by-building-a-simple-rpg-index/)
+  * [**C#**: *Creating a Roguelike Game in C#*](https://roguesharp.wordpress.com/)
+  * [**JavaScript**: *2D breakout game using Phaser*](https://developer.mozilla.org/en-US/docs/Games/Tutorials/2D_breakout_game_Phaser)
+  * [**JavaScript**: *How to Make Flappy Bird in HTML5 With Phaser*](http://www.lessmilk.com/tutorial/flappy-bird-phaser-1)
+  * [**Lua**: *BYTEPATH*](https://github.com/SSYGEN/blog/issues/30)
+  * [**Ruby**: *Write Yourself a Roguelike*](https://github.com/thoughtbot/write-yourself-a-roguelike)
+  * [**Ruby**: *Developing Games With Ruby*](https://leanpub.com/developing-games-with-ruby/read)
+
+* Build your own **Git**
+  * [**JavaScript**: *Gitlet*](http://gitlet.maryrosecook.com/docs/gitlet.html)
+  * [**JavaScript**: *Build GIT - Learn GIT*](https://kushagragour.in/blog/2014/01/build-git-learn-git/)
+  * [**Python**: *Just enough of a Git client to create a repo, commit, and push itself to GitHub*](https://benhoyt.com/writings/pygit/)
+  * [**Ruby**: *Rebuilding Git in Ruby*](https://robots.thoughtbot.com/rebuilding-git-in-ruby)
+
+* Build your own **Neural Network**
+  * [**C#**: *Neural Network OCR*](https://www.codeproject.com/Articles/11285/Neural-Network-OCR)
+  * [**Java**: *Neural Networks: Perceptron*](https://www.youtube.com/watch?v=ntKn5TPHHAk&feature=youtu.be)
+  * [**JavaScript**: *Neural Network implementation in Javascript, by an example*](https://franpapers.com/en/machine-learning-ai-en/2017-neural-network-implementation-in-javascript-by-an-example/)
+  * [**JavaScript**: *Neural networks from scratch for Javascript linguists (Part1 — The Perceptron)*](https://hackernoon.com/neural-networks-from-scratch-for-javascript-linguists-part1-the-perceptron-632a4d1fbad2)
+  * [**JavaScript**: *You can build a neural network in JavaScript even if you don’t really understand neural networks*](https://itnext.io/you-can-build-a-neural-network-in-javascript-even-if-you-dont-really-understand-neural-networks-e63e12713a3)
+  * [**JavaScript**: *How to create a Neural Network in JavaScript in only 30 lines of code*](https://medium.freecodecamp.org/how-to-create-a-neural-network-in-javascript-in-only-30-lines-of-code-343dafc50d49)
+  * [**Python**: *Optical Character Recognition (OCR)*](http://aosabook.org/en/500L/optical-character-recognition-ocr.html)
+
+* Build your own **Network Stack**
+  * [**C**: *Beej's Guide to Network Programming*](http://beej.us/guide/bgnet/html/multi/index.html)
+  * [**C**: *Let's code a TCP/IP stack*](http://www.saminiir.com/lets-code-tcp-ip-stack-1-ethernet-arp/)
+  * [**Ruby**: *How to build a network stack in Ruby*](https://medium.com/geckoboard-under-the-hood/how-to-build-a-network-stack-in-ruby-f73aeb1b661b)
+  
+* Build your own **Operating System**
+  * [**C**: *Operating Systems: From 0 to 1*](https://tuhdo.github.io/os01/)
+  * [**C**: *The little book about OS development*](https://littleosbook.github.io/)
+  * [**C**: *Kernel 101 –Let’s write a Kernel*](https://arjunsreedharan.org/post/82710718100/kernel-101-lets-write-a-kernel)
+  * [**C**: *How to create an OS from scratch*](https://github.com/cfenollosa/os-tutorial)
+  * [**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++**: *Writing a Bootloader*](http://3zanders.co.uk/2017/10/13/writing-a-bootloader/)
+  * [**Rust**: *Writing an OS in Rust*](https://os.phil-opp.com/first-edition/)
+
+* Build your own **Programming Language**
+  * [**C**: *Crafting interpreters: A handbook for making programming languages*](http://www.craftinginterpreters.com/)
+  * [**C**: *http://journal.stuffwithstuff.com/2013/12/08/babys-first-garbage-collector/*](http://journal.stuffwithstuff.com/2013/12/08/babys-first-garbage-collector/)
+  * [**C**: *Build Your Own Lisp: Learn C and build your own programming language in 1000 lines of code*](http://www.buildyourownlisp.com/)
+  * [**Go**: *Lexical Scanning in Go*](https://www.youtube.com/watch?v=HxaD_trXwRE)
+  * [**Haskell**: *Let's Build a Compiler*](http://alephnullplex.github.io/cradle/)
+  * [**Haskell**: *Write You a Haskell*](http://dev.stephendiehl.com/fun/)
+  * [**JavaScript**: *The Super Tiny Compiler*](https://github.com/jamiebuilds/the-super-tiny-compiler)
+  * [**OCaml**: *Writing a C Compiler*](https://norasandler.com/2017/11/29/Write-a-Compiler.html)
+  * [**Ruby**: *A Compiler From Scratch*](https://www.destroyallsoftware.com/screencasts/catalog/a-compiler-from-scratch)
+  * [**Python**: *A Python Interpreter Written in Python*](http://aosabook.org/en/500L/a-python-interpreter-written-in-python.html)
+  * [**Python**: *lisp.py: Make your own Lisp interpreter*](http://khamidou.com/compilers/lisp.py/)
+  * [**Python**: *Simple Iterator-based Parsing*](http://effbot.org/zone/simple-iterator-parser.htm)
+  * [**Python**: *Simple Top-Down Parsing in Python*](http://effbot.org/zone/simple-top-down-parsing.htm)
+
+* Build your own **Regex Engine**
+  * [**C**: *A Regular Expression Matcher*](https://www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html)
+  * [**C**: *Regular Expression Matching Can Be Simple And Fast*](https://swtch.com/~rsc/regexp/regexp1.html)
+  * [**JavaScript**: *Build a Regex Engine in Less than 40 Lines of Code*](https://nickdrane.com/build-your-own-regex/)
+  * [**Perl**: *How Regexes Work*](https://perl.plover.com/Regex/article.html)
+  * [**Scala**: *No Magic: Regular Expressions*](https://rcoh.svbtle.com/no-magic-regular-expressions)
+  
+* Build your own **Shell**
+  * [**C**: *Tutorial - Write a Shell in C*](https://brennan.io/2015/01/16/write-a-shell-in-c/)
+  * [**C**: *Let's build a shell!*](https://github.com/kamalmarhubi/shell-workshop)
+  * [**Ruby**: *A Unix Shell in Ruby*](https://www.jstorimer.com/blogs/workingwithcode/7766107-a-unix-shell-in-ruby)
+
+* Build your own **Template Engine**
+  * [**JavaScript**: *JavaScript template engine in just 20 lines*](http://krasimirtsonev.com/blog/article/Javascript-template-engine-in-just-20-line)
+  * [**Python**: *Approach: Building a toy template engine in Python*](http://alexmic.net/building-a-template-engine/)
+  * [**Python**: *A Template Engine*](http://aosabook.org/en/500L/a-template-engine.html)
+  * [**Ruby**: *How to write a template engine in less than 30 lines of code*](http://bits.citrusbyte.com/how-to-write-a-template-library/)
+
+* Build your own **Web Server**
+  * [**C#**: *Writing a Web Server from Scratch*](https://www.codeproject.com/Articles/859108/Writing-a-Web-Server-from-Scratch)
+  * [**Node.js**: *Let's code a web server from scratch with NodeJS Streams*](https://www.codementor.io/ziad-saab/let-s-code-a-web-server-from-scratch-with-nodejs-streams-h4uc9utji)
+  * [**PHP**: *Writing a webserver in pure PHP*](http://station.clancats.com/writing-a-webserver-in-pure-php/)
+  * [**Python**: *A Simple Web Server*](http://aosabook.org/en/500L/a-simple-web-server.html)
+  * [**Python**: *Let’s Build A Web Server.*](https://ruslanspivak.com/lsbaws-part1/)
+  * [**Python**: *Web application from scratch*](https://defn.io/2018/02/25/web-app-from-scratch-01/)
+  * [**Python**: *Building a basic HTTP Server from scratch in Python*](http://joaoventura.net/blog/2017/python-webserver/)
+  * [**Ruby**: *Building a simple websockets server from scratch in Ruby*](http://blog.honeybadger.io/building-a-simple-websockets-server-from-scratch-in-ruby/)
+
+* Uncategorized
+  * [**Alloy**: *The Same-Origin Policy*](http://aosabook.org/en/500L/the-same-origin-policy.html)
+  * [**C**: *Build Your Own Text Editor*](https://viewsourcecode.org/snaptoken/kilo/)
+  * [**C**: *How to Write a Video Player in Less Than 1000 Lines*](http://dranger.com/ffmpeg/ffmpeg.html)
+  * [**C**: *Learn how to write a hash table in C*](https://github.com/jamesroutley/write-a-hash-table)
+  * [**C++**: *Build your own VR headset for $100*](https://github.com/relativty/Relativ)
+  * [**C++**: *How to write an emulator (CHIP-8 interpreter)*](http://www.multigesture.net/articles/how-to-write-an-emulator-chip-8-interpreter/)
+  * [**Java**: *Build a Flashlight App*](https://www.youtube.com/watch?v=dhWL4DC7Krs)
+  * [**JavaScript**: *Learn JavaScript Promises by Building a Promise from Scratch*](https://levelup.gitconnected.com/understand-javascript-promises-by-building-a-promise-from-scratch-84c0fd855720)
+  * [**Python**: *A Pedometer in the Real World*](http://aosabook.org/en/500L/a-pedometer-in-the-real-world.html)
+  * [**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**: *Continuous Integration System*](http://aosabook.org/en/500L/a-continuous-integration-system.html)
+  * [**Python**: *Building a Facial Recognition Pipeline with Deep Learning in Tensorflow*](https://hackernoon.com/building-a-facial-recognition-pipeline-with-deep-learning-in-tensorflow-66e7645015b8)
+  * [**Rust**: *Let's build a browser engine*](https://limpet.net/mbrubeck/2014/08/08/toy-layout-engine-1.html)
+