QScope.org is an advanced online log analysis application providing statistics and charts with innovative features for HAM Radio operators.
While designed with amateur radio contesters score improvements in mind, it can help any HAM to have a better visibility over his logbook.

You can import ADIF or Cabrillo logs and have various statistics like QSOs per band, mode, operator; QSOs Rate; Operating Time...
Registration and usage are free, so give it a try!

Learn more about QScope.