Gentelella is a free responsive admin panel template created and managed by colorlib. It is packed with powerful jQuery plugins and built using Bootstrap a solid framework for responsive development.
It has uses Chart.js an opensource library for creating beautiful and power packed charts. It has all the form components like input fields, drop downs menus, date range selectors, multi file uploads. Support for input validation is built into it. Wizard style form completing with progress bar to give your client a friendly look without overload him with text fields.
Gentelella is free to download and use under MIT lisense. It is available to download from here ⇗