qdologs is two handy utilities (archive-maillogs and process-maillogs) that archive and report on qmail logs. Archives are based on day; reports include overall stats (requires qmailanalog) and RBL/DUL usage stats.
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.