Landlord Manager 8.20 is a complete ground and building rental manager that lets you take a complete, exhaustive and minutely detailed control of all the properties you have rented out. All the information is exportable to an MS Excel worksheet.
Apart from the habitual options of each property (characteristics, photos, etc) you can also create a log for all the expenses and income they generate. You can also control taxes, investment in repair and upgrading, etc, for each rental property.