Softlog Systems specializes in In-Circuit Serial Programming™ for Microchip microcontrollers. The ICP product line comprises several high-speed, production-grade in-circuit programmers, each of which offers a set of robust features and flexible options that can be adapted to each customer´s specific production requirements.
The following products have support for AVR and SAM devices:
Softlog products are available for sale through microchipDIRECT: https://www.microchipdirect.com/
Softlog System product page: http://www.softlog.com/index.asp?page=ICP2&parentid=2
List of supported devices: http://www.softlog.com/userfiles/file/Downloads/Device%20list.pdf