SKnote has released the AAX version (both Native and DSP) of STA-limit for Mac and Windows 32- and 64-bit formats.
A highly optimized (8 units on a HDX chip) emulation of an old STA-level tube compressor from Gates, STA-limit can be extremely transparent and add a bit of color from transformers and tubes.
MSRP $39.99. It is a free update for existing users.
NOTE: this is for AAX Native and DSP. VST and AU updates to follow.