Lighty

Lighty is the ideal tool to monitor the performance of your Oracle databases. Save time by quickly identifying problems with these many modules : Activity viewer based on ASH or L-ASH, reports, real time monitoring , multiple db monitoring. The software provides many other features. It has an AWR browser, a statspack browser, an object statistics explorer. It can also generate html reports (AWR, ASH, monitored sqls, ADDM). It is available for standard and enterprise editions Standalone or Rac DB. If you don't have the diagnostic and tuning packs licensed, you can install L-ASH to simulate the ASH feature.

Limitations:

Up to 5 connections