ERPNext
World's best free and open source ERP
...Manage full employee life cycle right from onboarding, payroll, attendance, expense claims, assets to separation. Effectively maintain and manage multilevel bill of materials, production planning, job cards & inventory. Increase productivity and lower costs by managing your sales and purchase cycles, from purchase to sales orders. Win and retain more customers by optimizing the sales process. Track leads, opportunities, and send the quotes on the go. Deliver both internal and external projects on time, budget, and profitability. Track tasks, timesheets, and issues by project. ...