Which databases do you know?

Choose which databases you know well enough to feel qualified to rank them.

Access
BerkeleyDB
BigTable
Cassandra
CouchDB
DB2
dbm
Derby
Excel
Flat files
GenieDB
h2
HBase
HypergraphDB
kdb
Memcachedb
MongoDB
MSSQL Server
MySQL
neo4j
Oracle
Phoenix
PostgreSQL
Redis
Riak
SQLAnywhere
Sqlite
Sybase
Tokyo Cabinet
Voldemort