DHTMLX

DHTMLX is a front-end toolkit for implementing complex user interfaces in enterprise web apps with minimum time and effort. DHTMLX provides a wide range of JS UI widgets such as a Gantt chart, Scheduler (event calendar), Kanban board, diagrams and org charts, spreadsheets, pivot tables, and many others, especially useful in project management applications. DHTMLX widgets can become a viable alternative to costly PM software and help you reduce development expenses and product net cost.