Atmel Studio 7 is the integrated development platform (IDP) for developing and debugging all AVR®
microcontroller applications. The Studio 7 IDP gives you a seamless and easy-to-use environment to write, build and debug your applications written in C/C++ or Assembly code.
More information on Atmel Studio 7 and downloads are available here
Please check the following related dev tools also. ATATMEL-ICE ATPOWERDEBUGGER