check_oracle_health is a plugin for the Shinken (Nagios) monitoring software that allows you to monitor various metrics of an Oracle database. It includes connection time, SGA data buffer hit ratio, SGA library cache hit ratio, SGA dictionary cache hit ratio, SGA shared pool free, PGA in memory sort ratio, tablespace usage, tablespace fragmentation, tablespace I/O balance, invalid objects, and many more.
Oracletool is an interactive, Web-based application for Oracle Database administration. The advantage of Oracletool over non-Web-based tools is that nothing needs to be installed on the client-side machine or in your databases. All you need to use Oracletool, once installed, is a Web browser.