Download of ATMEL ISP 6.7 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The following versions: 6.7, 3.0 and 1.0 are the most frequently downloaded ones by the program users.
ATMEL ISP was developed to work on Windows XP, Windows 7, Windows 8, Windows 10 or Windows 11 and is compatible with 32-bit systems. We recommend checking the downloaded files with any free antivirus. ATMEL ISP belongs to System Utilities. The program's installer file is commonly found as atmisp.exe. The actual developer of the free program is Mohammad Asim Khan.
From the developer:
The ISP flash application will update your firmware.
This is an ISP module for ATMEL Microcontroller that support ISP such AT89SXXXX, AVR families etc. Requires no power supply because it use power supply from target board. This circuit need only 10 resistors, 1 IC, 1 Capacitor,1 R-Pack.PCB size 1.6 X 4.1 cm. and Plated-Through-Hole type.
You may want to check out more software, such as Atmel TPM Driver, NuMicro ISP Programming Tool or Watch My Domains ISP, which might be related to ATMEL ISP.