If you have all the necessary scripts for the database creation, see if you can write a batch file and call the scripts from there.
example:

content of test.bat
@echo off
@echo This batch file will ......
sqlplus system/[email protected]
@z:\yourlocation\script1.sql
@z:\yourlocation\script2.sql

but for this to work, the machine should already have the oracle client software installed on it and a netservice already configured.

I'm not sure if this helps but I'm not aware of other commercial software for this task. Hopefully someone esle will have a better input.