Method for tracking income/expenses

[David Stone]

Hi, I was wondering what people used to track the income, expenses, late fees, etc for their rental properties.  I have 5 units currently and am using a word document I created to track everything, but it is getting quite full.  I am looking for an easy to use source, possibly an excel template.  If there's any good programs/apps out there that aren't unreasonably priced, I would be willing to look into some suggestions.  Thanks!