WorshipReady.com provides handcrafted chord charts for use on a number of platforms including Planning Center, PDF and OnSong. Access to content is through subscription only and limits the number of chord charts you can download per month based on your subscription level.
For more details about this service, or to sign up, please visit http://worshipready.com.
You can access WorshipReady.com chord charts by importing them right inside of OnSong. Just sign in, find a chart, and download it right into your OnSong library.