Ruya is a Python-based breadth-first, level-, delayed, event-based-crawler for crawling English, Japanese websites. It is targeted solely towards developers who want crawling functionality in their projects using API, and crawl control.
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.