One of the most heavily anticipated free agent classes in recent memory is set to hit the open market on July 1, with marquee names such as LeBron James, Carmelo Anthony and Dwyane Wade headlining this year's crop.
All 151 free agents based on Player Impact Estimate (PIE). The significance of the PIE stat is fully explained here, and is thought to be a more accurate version of the EFF rating. The formula for PIE is listed here.
The following is a list of the top 25 free agents based on PIE rating eligible to hit free agency, but you can view the list in its entirety here (Excel document).