The Events Calendar
The Events Calendar: #1 calendar plugin for WordPress. Create/manage events (virtual too!) on your site with the free plugin.
Add event category background colors to The Events Calendar events.
A feature rich solution to manage events, easily register, engage customers with upcoming event visibility over events calendar & ticket editing.
A great plugin to implement custom styled by themes.
A calendar plugin supporting multiple calendars, recurring events, and several different widgets / shortcodes. More info at http://calendar-plugin.com