Let's start out by an absolutely amazing blog post called Increasing diversity at your conference by @ashedryden, which focuses on the entire selection process and the conference marketing, and it includes an impressive list of useful resources you should dig into. Thanks for sharing this with me, @ChrisAnnODell!
It's becoming more and more popular to anonymize the selection process in order to avoid unconscious bias. Many have blogged about how they do this and I really recommend looking at the posts written by CSSConf EU and JSConf EU. Another conference that did this was DjangoCon Europe, and 54% of their speakers are women!
CallbackWomen work hard to increase diversity at programming conferences, and they are doing a great job following their mission and helping organizers get in touch with female speakers. Their website contains plenty of useful resources you should check out and they use their Twitter feed to inform minority speakers about open Call for Papers at conferences all over the world.
I want to wrap up this blog post with showing off the many Tech Women Keynoting at Tech Conferences. So don't despair, even if you're having difficulties reaching them, they do exist!
Do you have any resources you want to share? Please leave a comment, and I'll add them to my list.