There are currently no Java OpenSource spell checkers. This is a project that is seeks to remedy that. Jazz is based on most of the algorithms that aspell has -- so the suggestions they come up with are very similar.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.