We are looking at implementing a expense tracking software in our company.  Though we are on Oracle, only the Oracle GL has been implemented.  Would it be possible to implement Oracle Iexpense as a stand alone module or is there any dependencies on other Oracle modules as well.

I think Oracle IExpense is part of Oracle Payables module. you do need install Oracle Payable module if you want to use Oracle IExpense.

Attached is a good document regarding how to implement IExpense.

Good luck.