From "The Omni Mouth", Omni Group's blog, OmniWeb, OmniDazzle, OmniDiskSweeper, and OmniObjectMeter are now freeware. This decision is relayed in Omni Group's usual light, irreverent manner, but it's a big one, in my opinion. Software development is hard work and requires a lot of investment, so I'm grateful Omni Group decided to make these fine programs available for free.
If you are on a Mac, and have never checked them out, take a test drive of Omni Group's very high quality commercial offerings, like OmniGraffle, OmniOutline, OmniPlan or OmniFocus. I use these regularly. They're worth it, so go buy some.