Commercial Rotating Drum
There are many companies that sell these "off the ground" type tumblers. They are expensive, but offer some advantages in ease of use and turning. Often, they come with fantastic promises, like "make compost in 2 weeks!"--or some such claim. While we've never been able to get compost that quickly from this method, the material will decompose, and critters like rodents and racoons would have a hard time getting into it! Since the volume of the material inside is not sufficient to maintain heat, I would not recommend composting weeds gone to seed or diseased plant material, since they might come back to haunt your garden. One thing that this type of compost method lacks is worms, since it is not near enough to the ground to attract them. We found that adding a handful of worms from other compost bins helped speed the process.