OpenTickets Community Edition is a FREE plugin created to work with WordPress and WooCommerce as an open source project for event publishing and online ticket sales.
Yes, it is completely free!
It is perfect for those that manage their own WordPress websites. For bands, non-profits, venues, festivals and others that need general admission online ticket sales, this is a free, open source solution with community-based support.
If your browser has been set to disallow popups, you can cut and paste this URL into your web browser or click this link: http://wordpress.org/plugins/opentickets-community-edition/
After you Download, here are a couple pages that are a great starting point:
Larger organizations and venues that require stable release cycles, larger ticket volume, all features and professional support can choose OpenTickets Enterprise.