Award Winning Construction Accounting Software Integrity Software are providers of the Evolution range of construction industry specific job costing and accounting software in the UK and Ireland. Our software is used by Contractors, Sub-contractors, Civil Engineers, House Builders, Property Developers and Facilities Management/Service companies, to manage the financial and operational aspects of their business. We have a long track record of providing solutions to the construction market spanning over 30 years. We have over 900 customers in the broader construction sector in the UK and Ireland with our two core accounting products, Evolution Mx (previously Mardak) and Evolution.