Expense Management. Manage expenses, travel requests, and employee advances efficiently with our open source HRMS & payroll software. ERPNext helps managers to see all employee expenses in one go. Easy approvals and out-of-the-box configurable workflows help save the manual effort of managing expense claims. Try Now →. Welcome to openDCIM. This is openDCIM, a free, web based Data Center Infrastructure Management application. DCIM means many different things to many different people, and there is a multitude of commercial applications available. openDCIM does not contend to be a function by function replacement for commercial applications.