Club Log is a web-based application which uses a database to analyse amateur radio log files, which are uploaded in the common ADIF format. Using the logs, it is possible to build band-mode league tables of amateurs' QSOs, provide efficient log search tools and create most wanted lists for DXCC entities (both over all time and in recent history, or by mode for example). Also, Club Log can give back to its users the ability to find "wanted" DX spots, and other analysis of their logs which might be hard to do with normal logging software.
Look at http://www.clublog.org
Let me say thanks to Michael G7VJR for this initiative