PreSonus released Studio One 5.5

Studio One 5.5 adds many new improvements for production, performance, and especially mastering. The first and still only DAW with an integrated mastering environment, Studio One 5.5’s Project Page is now even more powerful. With more than two dozen new features, improvements, and workflow enhancements, Studio One 5.5 will supercharge your productions whether your creating, mastering, or performing them live.

More info here: PreSonus | Studio One 5.5