The Public Patent Foundation represents the public interest in patent law. While this might seem as odd as the EarthJustice Fund once did (it represents everyone who has a stake in the health of planet earth), the need to protect the public interest regarding technology innovation, new types of knowledge, and access to and use of the commons, is increasingly important.
I'm also impressed with the wikipatents site, which invites the general public to contribute to the time-consuming process of patent review. A great way to make sure that what we all hold in common remains accessible to us all. I'm no anti-government conservative, but folks who believe there must be a better way than those "damn bureaucrats" will like this also.