Here i have a excel tool for do analysis on AWR Repository, I have developed it with VBA language (Visual Basic for Applications). This tool is capable for create normal and pivot charts (bar, lineal, area, etc.) for every metric (topquery, event waits, sysmetric, systat, etc.) for every Rac Instance. For instance, with this tool you can show charts about the top querys, top event waits, top sys time model, sysmetrichistory, database growth, etc. for any date you want. And the connectivity to database is so easy, I use the same Oracle Client for do connectivity.