Not free bus Sonalskis have a summer special on their multiband compressor. Think its only about £80. Tried the demo though and I wasn't too fond of it.
Also IK Multimedia have a summer group buy on for their T-Racks singles which you could get their multi band compressor with. Buy one plug (£75) and you get another free, plus another if 500 people participate, plus another if 1000 people participate. So if enough people buy then its four plugs for £75.
Dunno about any freebies other than the ones mentioned though...