Fisheye is a revision-control browser and search engine owned by Atlassian, Inc. Although Fisheye is a commercial product, it is freely available to open source projects and non-profit institutions. In addition to the advanced search and diff capabilities, it provides: * the notion of changelog and changesets - even if the underlying version control system (such as CVS) does not support this * direct, resource-based URLs down to line-number level * monitoring and user-level notifications via e-mail or RSS