Postgresql

packages that are required for postgresql maintanance/monitoring:

PGTop
Profiler
Systemtap maybe this instead of Profiler (DTrace alike)
PGFouine PostgreSQL logs analyzer
PG_Repack no clusterdb please!!!
Collectd we also need to write NICE queries for the PostgreSQL plugin
PG_Buffercache included in 8.3.x contrib module in previous versions
PGSpy libpcap based querry spying
PGStatsPack this is a question mark…
Veil we might be interested in this for protecting privacy in shared hosting….