Love it or hate it, Vim is an extremely useful tool. This is a great tutorial that covers the basics and advanced techniques.
This Reddit post has some awesome resources regarding machine learning.
This guide is a practical resource for developing a set of transactional emails that will move your new users through the sales funnel toward becoming happy, engaged, and paying customers.
Ridiculously comprehensive and extremely useful for staying modern as a company.
Get a full stack up and running from scratch in about an hour with this tutorial. This is an absolutely beautiful introduction to these technologies.
I’m going through a Pebble phase right now. I bought a Pebble Steel and want to start making apps for it. They have an online IDE called CloudPebble that lets you make Pebble apps using your web browser. The Pebble Developer website is a great resource for tutorials and documentation. Chris Lewis’ Github repository has a bunch of apps he’s made along with their source.
Here’s a cool guide on XDA Developers that shows you how to run PC games on your Android device using DosBox.
Robert Thorpe put together a huge list of development tutorials for different technologies.
The No Excuse List is a collection of the best links on the web to learn anything, free!
A series of YouTube videos that teach you how to make a game using GameMaker. Aimed at beginners, no previous coding knowledge necessary!