IBM DB2
jdbc:db2://<HOST>:<PORT>/<DB>
COM.ibm.db2.jdbc.app.DB2Driver

JDBC-ODBC Bridge
jdbc:odbc:<DB>
sun.jdbc.odbc.JdbcOdbcDriver

Microsoft SQL Server
jdbc:weblogic:mssqlserver4:<DB>@<HOST>:<PORT>
weblogic.jdbc.mssqlserver4.Driver

Oracle Thin
jdbc:oracle:thin:@<HOST>:<PORT>:<SID>
oracle.jdbc.driver.OracleDriver

PointBase Embedded Server
jdbc:pointbase://embedded[:<PORT>]/<DB>
com.pointbase.jdbc.jdbcUniversalDriver

Cloudscape
jdbc:cloudscape:<DB>
COM.cloudscape.core.JDBCDriver

Cloudscape RMI
jdbc:rmi://<HOST>:<PORT>/jdbc:cloudscape:<DB>
RmiJdbc.RJDriver

Firebird (JCA/JDBC Driver)
jdbc:firebirdsql:[//<HOST>[:<PORT>]/]<DB>
org.firebirdsql.jdbc.FBDriver

IDS Server
jdbc:ids://<HOST>:<PORT>/conn?dsn='<ODBC_DSN_NAME>'
ids.sql.IDSDriver

Informix Dynamic Server
jdbc:informix-sqli://<HOST>:<PORT>/<DB>:INFORMIXSERVER=<SERVER_NAME>
com.informix.jdbc.IfxDriver

InstantDB (v3.13 and earlier)
jdbc:idb:<DB>
jdbc.idbDriver

InstantDB (v3.14 and later)
jdbc:idb:<DB>
org.enhydra.instantdb.jdbc.idbDriver

Interbase (InterClient Driver)
jdbc:interbase://<HOST>/<DB>
interbase.interclient.Driver

Hypersonic SQL (v1.2 and earlier)
jdbc:HypersonicSQL:<DB>
hSql.hDriver

Hypersonic SQL (v1.3 and later)
jdbc:HypersonicSQL:<DB>
org.hsql.jdbcDriver

Microsoft SQL Server (JTurbo Driver)
jdbc:JTurbo://<HOST>:<PORT>/<DB>
com.ashna.jturbo.driver.Driver

Microsoft SQL Server (Sprinta Driver)
jdbc:inetdae:<HOST>:<PORT>?database=<DB>
com.inet.tds.TdsDriver

Microsoft SQL Server 2000 (Microsoft Driver)
jdbc:microsoft:sqlserver://<HOST>:<PORT>[;DatabaseName=<DB>]
com.microsoft.sqlserver.jdbc.SQLServerDriver

MySQL (MM.MySQL Driver)
jdbc:mysql://<HOST>:<PORT>/<DB>
org.gjt.mm.mysql.Driver

Oracle OCI 8i
jdbc:oracle:oci8:@<SID>
oracle.jdbc.driver.OracleDriver

Oracle OCI 9i
jdbc:oracle:oci:@<SID>
oracle.jdbc.driver.OracleDriver

PostgreSQL (v6.5 and earlier)
jdbc:postgresql://<HOST>:<PORT>/<DB>
postgresql.Driver

PostgreSQL (v7.0 and later)
jdbc:postgresql://<HOST>:<PORT>/<DB>
org.postgresql.Driver

Sybase (jConnect 4.2 and earlier)
jdbc:sybase:Tds:<HOST>:<PORT>
com.sybase.jdbc.SybDriver

Sybase (jConnect 5.2)
jdbc:sybase:Tds:<HOST>:<PORT>
com.sybase.jdbc2.jdbc.SybDriver

To test your driver once it's installed, try the following code:

{
  Class.forName("Driver name");
  Connection con = DriverManager.getConnenction("jdbcurl","username","password");
  //other manipulation using jdbc commands
}
catch(Exception e)
{
}