Getting started for developers
Resources for getting started as a CQ5 developer
http://www.undp.org/content/dam/support ihelp/docs/CQ5 Basic CO User Guide.pdf
PDF document published on UNDP.org - this might be a useful guide to some.
http://dev.day.com/docs/en/crx/current/developing/developers_getting_started.html
Official documentation.
https://soonerspace.ou.edu/content/dam/WebCommunications/PDFs/CQ5/CQ5%20training%20010510.pdf
Another PDF training guide, for content authors.
http://blog.navigationarts.com/building-components-in-adobe-cq5-a-tutorial/
Video guide on how to build components in CQ5.