An auxiliary findbugs.sourceforge.net plugin for java bug detectors that fall outside the narrow scope of detectors to be packaged with the product itself. These detectors are not limited by 'pure bug' percentages, or by general purpose value. See webs
An excellent add-on library to Findbugs. Some detectors can be somewhat noisy, but the overall quality and usefulness of the collection more than makes up for any deficiencies.