Stevestrummer mentioned the free MeldaProduction plugs above. I had previously downloaded them but have not had the chance to try them.
But then I was on their site looking at the latest updates. I noticed that they described that it's free for personal use, and not for commercial use. But then it said that if you purchase the license for commercial use, the plugs will no longer invoke your browser occasionally to show their website. YUUUUUUK!!!!
So I deleted the plugs. But I'm wondering, has anybody ever used the Melda plugs and suddenly have their browser pop up while working on a Sonar project?