Vote for Sysload
Monitors system performance on Operating Systems (Unix, Linux, Windows 2000/XP and NT, Netware, AS/400, GC0S7), Databases (Oracle, SQL Server, DB2, Informix, Sybase) and Applications (including Oracle Apps, SAP, Exchange, IIS).
Sysload provides reporting on real-time and historical system data for finding bottlenecks. Features include alerts, trend analysis, automatic diagnosis, log analysis, web application, response time, and service level monitoring.