Oracle Database11gRelease 2 (11.2.0.1.0) Enterprise/Standard Edition forLinuxZseries (64-bit)
http://download.oracle.com/otn/linux/oracle11g/linux.zseries64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/linux/oracle11g/linux.zseries64_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit)
http://download.oracle.com/otn/nt/oracle11g/112010/win32_11gR2_database_1of2.zip;
http://download.oracle.com/otn/nt/oracle11g/112010/win32_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (364-bit)
http://download.oracle.com/otn/nt/oracle11g/112010/win64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/nt/oracle11g/112010/win64_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for Linux (32-bit)
http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_database_1of2.zip;
http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for Linux (64-bit)
http://download.oracle.com/otn/linux/oracle11g/R2/linux.x64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/linux/oracle11g/R2/linux.x64_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for solaris.sparc (64-bit)
http://download.oracle.com/otn/solaris/oracle11g/R2/solaris.sparc64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/solaris/oracle11g/R2/solaris.sparc64_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for solaris (64-bit)
http://download.oracle.com/otn/solaris/oracle11g/R2/solaris.x64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/solaris/oracle11g/R2/solaris.x64_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for hpia (64-bit)
http://download.oracle.com/otn/hp/oracle11g/R2/hpia64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/hp/oracle11g/R2/hpia64_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition foraix.ppc (64-bit)
http://download.oracle.com/otn/aix/oracle11g/R2/aix.ppc64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/aix/oracle11g/R2/aix.ppc64_11gR2_database_2of2.zip;

Oracle Database 11g Release 2 (11.2.0.1.0) Enterprise/Standard Edition for hpux.parisc (64-bit)
http://download.oracle.com/otn/hp/oracle11g/R2/hpux.parisc64_11gR2_database_1of2.zip;
http://download.oracle.com/otn/hp/oracle11g/R2/hpux.parisc64_11gR2_database_2of2.zip;

下面的链接是11gR1版本：
http://download.oracle.com/otn/nt/oracle11g/win32_11gR1_database_111070.zip;
http://download.oracle.com/otn/nt/oracle11g/win64_11gR1_database_111070.zip;
http://download.oracle.com/otn/nt/oracle11g/win32_11gR1_database_1013.zip;
http://download.oracle.com/otn/nt/oracle11g/win64_11gR1_database_1013.zip;
http://download.oracle.com/otn/linux/oracle11g/linux_11gR1_database_1013.zip;
http://download.oracle.com/otn/linux/oracle11g/linux.x64_11gR1_database_1013.zip;
http://download.oracle.com/otn/solaris/oracle11g/solaris.sparc64_11gR1_database_1013.zip;
http://download.oracle.com/otn/aix/oracle11g/aix.ppc64_11gR1_database_1013_1of2.zip;
http://download.oracle.com/otn/aix/oracle11g/aix.ppc64_11gR1_database_1013_2of2.zip;
http://download.oracle.com/otn/hp/oracle11g/hpia64_11gR1_database_1013_1of2.zip;
http://download.oracle.com/otn/hp/oracle11g/hpia64_11gR1_database_1013_2of2.zip;
http://download.oracle.com/otn/hp/oracle11g/hpux.parisc_11gR1_database_1013_1of2.zip;
http://download.oracle.com/otn/hp/oracle11g/hpux.parisc_11gR1_database_1013_2of2.zip;