Acustica Audio has released Ultramarine3, a mid-side stereo compressor based on CORE9. It is designed to faithfully emulate a vintage hardware compressor designed in early 1950's.
Price: €299 here. For a limited period Acustica Audio is offering 15% off (€254.15). For owners of previous versions of Ultramarine, this upgrade is free. There is also a free trial version for a 4-week test. It is available as a digital download immediately after €0.00 payment.