XBlocks

General Presentations

http://doctoryes.github.io/openedx_talk_xblocks/#1

XBlock API Guide

http://edx.readthedocs.org/projects/xblock/en/latest/

XBlock Tutorial

If you haven't yet gone through the tutorial, do so!

http://edx.readthedocs.org/projects/xblock-tutorial/en/latest/

Braden MacDonald has also made a great presentation for OpenEdxCon 2016 on making an XBlock:

How to Install XBlocks in an OpenEdx Instance

Adding a New XBlock on Production

XBlock Directory

Which XBlocks exist and are available for use? Where's the XBlock code? Check here:

XBlocks Directory