LSR Audio have announced COMPrime in AAX 64 Bit version, the RTAS versions are also available for both Mac and Windows.

COMPrime includes;

• Natural progressive compression curve
• Very fast reaction
• Program-dependent release
• Vintage meter (displays gain reduction or output level)
• Adjustable tube drive, from subtle warming to hot overdrive
• Side chain low cut filter with adjustable frequency
• Soft or medium knee
• Parallel compression (mix control)
• Makeup level (-15dB to +15dB)
• Mono, stereo and multi-channel
• Double precision floating point processing

More here