使用迅雷等下载工具复制下面的链接地址就可以直接下载
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit)
http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_client_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_clusterware_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_gateways_win32.zip
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (x64)
http://download.oracle.com/otn/nt/oracle10g/10201/102010_win64_x64_database.zip
http://download.oracle.com/otn/nt/oracle10g/10201/102010_win64_x64_client.zip
http://download.oracle.com/otn/nt/oracle10g/10201/102010_win64_x64_clusterware.zip
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Linux x86
http://download.oracle.com/otn/linux/oracle10g/10201/10201_database_linux32.zip
http://download.oracle.com/otn/linux/oracle10g/10201/10201_client_linux32.zip
http://download.oracle.com/otn/linux/oracle10g/10201/10201_gateways_linux32.zip
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Linux x86-64
http://download.oracle.com/otn/linux/oracle10g/10201/10201_database_linux_x86_64.cpio.gz
http://download.oracle.com/otn/linux/oracle10g/10201/10201_client_linux_x86_64.cpio.gz
http://download.oracle.com/otn/linux/oracle10g/10201/10201_clusterware_linux_x86_64.cpio.gz
http://download.oracle.com/otn/linux/oracle10g/10201/10201_gateways_linux_x86_64.cpio.gz
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for AIX5L
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_database.cpio.gz
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_client.cpio.gz
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_cluster.cpio.gz
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_gateways.cpio.gz
Oracle Database 10g Release 2 (10.2.0.2) Enterprise/Standard Edition for Solaris Operating System (x86)
http://download.oracle.com/otn/solaris/oracle10g/10202/10202_database_solx86.zip
http://download.oracle.com/otn/solaris/oracle10g/10202/10202_client_solx86.zip
http://download.oracle.com/otn/solaris/oracle10g/10202/10202_clusterware_solx86.zip
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Solaris Operating System (x86-64)
http://download.oracle.com/otn/solaris/oracle10g/10201/x8664/10201_database_solx86_64.zip
http://download.oracle.com/otn/solaris/oracle10g/10201/x8664/10201_client_solx86_64.zip
http://download.oracle.com/otn/solaris/oracle10g/10201/x8664/10201_clusterware_solx86_64.zip
Oracle 10g (10.2.0.3) 支持vista，win7和2008
32bit
http://download.oracle.com/otn/nt/oracle10g/10203/10203_vista_w2k8_x86_production_db.zip
64bit
http://download.oracle.com/otn/nt/oracle10g/10204/10204_vista_w2k8_x64_production_db.zip
官网网站 http://www.oracle.com/technetwork/cn/database/10203vista-088351-zhs.html
Oracle Database 11g Release 2 Client (11.2.0.1.0) for Microsoft Windows
32bit
http://download.oracle.com/otn/nt/oracle11g/112010/win32_11gR2_client.zip
64bit
http://download.oracle.com/otn/nt/oracle11g/112010/win64_11gR2_client.zip
Oracle Database 11g Release 2 (11.2.0.1.0) for Microsoft Windows
32bit
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
64bit
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 12c 第 2 版(12.2.0.1.0)
window 64bit
https://download.oracle.com/otn/nt/oracle12c/122010/winx64_12201_database.zip
参考了
http://www.cnblogs.com/wangdetian168/archive/2011/03/01/1968155.html
http://www.cnblogs.com/ZJ199012/archive/2012/03/21/2410275.html