• NodeSchool
  Contains essential skills for working with Node.js
• LearnRx
  Learn functional programming in JavaScript. This video series can help you if you're feeling stuck.

• Learn Enough Command Line to Be Dangerous by Michael Hartl
  Well-written guide that assumes no previous knowledge, and explains jargon. Also contains little exercises to demonstrate the concepts. Highly recommend for beginners.
• The Art of the Command Line by jlevy
  A thorough guide with useful tips about command line. Great for beginners, and goes through more advanced tricks for those trying to become command-line power-users.
• Bandit Wargame by OverTheWire
  Although Bandit is meant to be an intro to security, it's great for diving into more advanced command line concepts. Continue to other OverTheWire wargames to learn about security.

• Visualgo
  Visual learning tool for a bunch of Algorithms and Data Structures.
• Sorting Algorithm Animations
  Animated demos of Insertion, Selection, Bubble, Shell, Merge, Heap, Quick, and Quick3 sorts, with an explanation of how they work.
• Problem Solving with Algorithms and Data Structures
  For the less visual learners, an online book explaining algorithms and data structures (uses Python).
• A Visual Introduction to Machine Learning A primer on machine learning for beginners, with helpful visualizations.

• Lecture Notes - Jonathan Shewchuk
  Notes containing simple explanations of Big-O and asymtotic analysis. Warnings and misconceptions section towards the bottom is pretty good too.
• Big O Lecture Notes - Jim Marshall Tons of graphs for comparing running times.
• Big-O Cheat Sheet Super helpful cheat sheet for common data structures.

• Try Git
  Never tried git? This interactive tutorial is for you!
• Github Git Cheatsheet
  (PDF) Helpful for those who haven't quite memorized the more frequently-used git commands.
• Atlassian's Git Tutorials
• first aid git
  A searchable collection of the most frequently asked Git questions
• Git Tips From The Trenches
  For those who want to elevate their version control game. This is a list of neat commands, configs, and neat tricks.
• A successful Git branching model
  Development model for git branches. Especially helpful for long-term projects.
• Keeping a Github Fork Updated
  For those starting to contribute to Open Source, or those starting their first Big Kid Software Engineering Project, where one has to git along with others (not sorry for pun).
• Writing good git commit messages
  Learn how to write git messages that will make sense to a newcomer for your project.
• Git Manual
  Precise and nitpicky, but this is basically an official manual, so that's par for the course.

• The Hitchhiker's Guide to Python
  An opinionated and thorough guide for getting started in Python.
• Learn Python The Hard Way
  A thorough guide to Python, great for people who have never programmed before.

• Try Ruby by Code School
  Learn the basics of Ruby in the browser.
• Learn to Program by Chris Pine
  This online book is a thorough introduction to programming and Ruby.
• Ruby Monk
  Interactive Ruby tutorials for various levels.

• Go Training by William Kennedy
  While intended for in-person learning, the course material includes notes, examples, exercises, and links to other resources.
• Resources for New Go Programmers
  Can never have too many resource lists.

• JS the Right Way
  A guide intended to introduce new developers to JavaScript.
• Eloquent JavaScript
  Introduction to JavaScript and web development.

• Dash by General Assembly
  Get introduced to HTML and CSS through a series of interactive tutorials.
• Learn to Code HTML & CSS by Shay Howe
  This guide offers a more in-depth introduction to HTML and CSS, including how to follow best practices.

• Open Web BU's Resource Page
  A bunch of resources for learning, prototyping, and designing. Sections are also sorted into Free and Paid, which is a nice bonus.
• Web Field Manual

• Learn SQL by Codecademy
• MISSQL Command
  A simple game to practice SQL basics.
• PostgreSQL Exercises
  Learn about more complex SQL queries with a series of exercises.

• Latency Numbers Every Engineer Should Know
  Flash cards with useful estimates for reasoning about how long operations take.

• Cassidy Williams' Guide for Getting a Gig
  Oriented towards college students.
• A Freshman's Guide to Tech Internships
  Specifically written for college first-years. Tons of information about what companies are looking for, too, as well as a list of freshman-specific programs.
• How to cold-email a startup into giving you an internship
• Front End Developer Interview Questions
  Tons of them. From HTML5 Boilerplate.

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