Eventide Omnipressor is my favorite software compressor right now. It is the snappiest, sharpest sounding dynamics processor I've heard. The expander component is the only software I've found musically useful in this role. I can't recommend this one highly enough for drums, arpeggiated synths or even group processing.
Omnipressor///Eventide Native Plugin
If you need to have a compressor which can be made to pump and breathe easily the Omnipressor will not disappoint you.
Most software compressor/limiters are categorized as either transparent or with proprietary character. The Omnipressor certainly would be found in the latter. Its creative possibilities when used with drum tracks, solo or composite, are numerous. Dynamic Reversal gives an engineer a steering wheel to spin control of both level and time constants.