mastering
I find the ultrafunk multiband compressor to be quite usable for mastering stereo tracks if not overdone. However, my favorite multiband compressor is the PSP Vintage Warmer which came with 2.2xl. I can patch it across the outputs of CD Architect 5, and it brings the levels up to commercial CD levels without artifacts or coloration. I find this plug in to be worth its weight in gold, although it goes for much less money than Waves plug ins.
Lynn